Cnidaria
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The document summarizes key characteristics of the phylum Cnidaria. Cnidaria exhibit radial symmetry and have two basic body plans - either diploblastic or with radial canals extending from a central gastrovascular cavity. They possess cnidocytes or cnidae, which are capsule-like organelles used to capture prey. The phylum contains four classes: Anthozoa, Hydrozoa, Scyphozoa, and Cubozoa.
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Phylum Cnidaria
The document discusses the phylum Cnidaria, which contains about 10,000 species with two main body plans: the medusa and polyp forms. Polyps are cylindrical and often form large colonies by attaching to the sea floor. There are three main classes within Cnidaria: Anthozoa, which lack a medusa stage; Octocorallia whose polyps have 8 tentacles; and Hexacorallia whose polyps have 6 pairs of mesenteries. Examples of genera and species are provided along with their defining characteristics and classifications.
Cnidarians
Cnidarians are soft-bodied animals that have stinging cells called cnidocytes. They have two main forms in their life cycle, the polyp and medusa forms. Cnidarians feed by pulling prey into their gastrovascular cavity, which is a single opening that functions as both a digestive system and circulatory system. Major groups of cnidarians include jellyfish, hydras, sea anemones, and corals.
Cnidaria gen features -2012
- Cnidarians are a phylum of mostly marine animals that include jellyfish, corals, sea anemones. They have radial symmetry and two basic body forms - polyps and medusae.
- They have stinging cells called cnidocytes that help capture prey. Their nervous system is a nerve net. They reproduce sexually and asexually. Larvae are called planulae.
- Anthozoans like corals and sea anemones have a tubular body with a mouth and oral disc surrounded by tentacles. Their pharynx leads into the coelenteron.
Zoology
Cnidaria and Ctenophora are radiate animals that include jellyfish, hydras, sea anemones, and corals. They have stinging cells called nematocysts that are used to capture prey. Cnidarians have two main body forms - polyps and medusae. They lack specialized organ systems and reproduce both sexually and asexually. Major classes of Cnidaria include Hydrozoa, Scyphozoa, Cubozoa, and Anthozoa.
Phylum cnidaria report
Cnidarians like hydra, jellyfish, coral, and sea anemones can take the form of polyps or medusas. Polyps are attached to surfaces while medusas are free-swimming. They capture prey using nematocysts in their tentacles and digest food in their guts. Reproduction varies between species, but includes both asexual budding and sexual reproduction.
Cnidarians
Cnidarians are soft-bodied aquatic animals that exhibit radial symmetry and possess true tissues. They have a sac-like body with a central digestive cavity and a single opening surrounded by tentacles bearing stinging cells. Cnidarians exist as sessile polyps or free-swimming medusae, and their life cycle may alternate between these two forms. The phylum is divided into three classes: Hydrozoa (hydras), Scyphozoa (jellyfish), and Anthozoa (corals and sea anemones).
Phylum cnidaria
The document summarizes the characteristics of the phylum Cnidaria. It notes that Cnidaria have four divisions - Scyphozoa, Cubozoa, Hydrozoa, and Anthozoa. They have two basic body forms and lack bones, instead having a hydrostatic skeleton for flexibility and locomotion. Most Cnidaria are diploblastic with outer ectoderm and inner endoderm layers containing nerve nets. They have a nerve net system and diffuse respiration and circulation. Reproduction can be sexual or asexual. All Cnidaria have radial symmetry and tentacles containing stinging nematocyst cells.
10. Phyla Cnidaria and Ctenophora
Phylum Cnidaria and Ctenophora are two groups of aquatic animals. Cnidaria includes jellyfish, corals, sea anemones and have radial symmetry and two main forms - polyps and medusae. They have stinging nematocyst cells and a nerve net. Ctenophora, or comb jellies, are similar but not cnidarians and move using cilia.
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Phylum Cnidaria
The document discusses the phylum Cnidaria, which contains about 10,000 species with two main body plans: the medusa and polyp forms. Polyps are cylindrical and often form large colonies by attaching to the sea floor. There are three main classes within Cnidaria: Anthozoa, which lack a medusa stage; Octocorallia whose polyps have 8 tentacles; and Hexacorallia whose polyps have 6 pairs of mesenteries. Examples of genera and species are provided along with their defining characteristics and classifications.
Cnidarians
Cnidarians are soft-bodied animals that have stinging cells called cnidocytes. They have two main forms in their life cycle, the polyp and medusa forms. Cnidarians feed by pulling prey into their gastrovascular cavity, which is a single opening that functions as both a digestive system and circulatory system. Major groups of cnidarians include jellyfish, hydras, sea anemones, and corals.
Cnidaria gen features -2012
- Cnidarians are a phylum of mostly marine animals that include jellyfish, corals, sea anemones. They have radial symmetry and two basic body forms - polyps and medusae.
- They have stinging cells called cnidocytes that help capture prey. Their nervous system is a nerve net. They reproduce sexually and asexually. Larvae are called planulae.
- Anthozoans like corals and sea anemones have a tubular body with a mouth and oral disc surrounded by tentacles. Their pharynx leads into the coelenteron.
Zoology
Cnidaria and Ctenophora are radiate animals that include jellyfish, hydras, sea anemones, and corals. They have stinging cells called nematocysts that are used to capture prey. Cnidarians have two main body forms - polyps and medusae. They lack specialized organ systems and reproduce both sexually and asexually. Major classes of Cnidaria include Hydrozoa, Scyphozoa, Cubozoa, and Anthozoa.
Phylum cnidaria report
Cnidarians like hydra, jellyfish, coral, and sea anemones can take the form of polyps or medusas. Polyps are attached to surfaces while medusas are free-swimming. They capture prey using nematocysts in their tentacles and digest food in their guts. Reproduction varies between species, but includes both asexual budding and sexual reproduction.
Cnidarians
Cnidarians are soft-bodied aquatic animals that exhibit radial symmetry and possess true tissues. They have a sac-like body with a central digestive cavity and a single opening surrounded by tentacles bearing stinging cells. Cnidarians exist as sessile polyps or free-swimming medusae, and their life cycle may alternate between these two forms. The phylum is divided into three classes: Hydrozoa (hydras), Scyphozoa (jellyfish), and Anthozoa (corals and sea anemones).
Phylum cnidaria
The document summarizes the characteristics of the phylum Cnidaria. It notes that Cnidaria have four divisions - Scyphozoa, Cubozoa, Hydrozoa, and Anthozoa. They have two basic body forms and lack bones, instead having a hydrostatic skeleton for flexibility and locomotion. Most Cnidaria are diploblastic with outer ectoderm and inner endoderm layers containing nerve nets. They have a nerve net system and diffuse respiration and circulation. Reproduction can be sexual or asexual. All Cnidaria have radial symmetry and tentacles containing stinging nematocyst cells.
10. Phyla Cnidaria and Ctenophora
Phylum Cnidaria and Ctenophora are two groups of aquatic animals. Cnidaria includes jellyfish, corals, sea anemones and have radial symmetry and two main forms - polyps and medusae. They have stinging nematocyst cells and a nerve net. Ctenophora, or comb jellies, are similar but not cnidarians and move using cilia.
13. class hydrozoa with clear explanation only on slide share free
Hydrozoans are a class of cnidarians that can live in both marine and freshwater environments. Most hydrozoans display alternation of generations, alternating between a polyp stage and a medusa stage, though some lack one stage. Obelia is a common marine hydrozoan that forms colonial polyps connected by a shared gastrovascular system. Its polyps specialize into gastrozooids for feeding and gonzooids for reproducing by budding off small medusae. Gonionemus is a hydrozoan where the medusa stage predominates, using jet propulsion and statocysts for swimming and navigation. Hydra is a freshwater hydrozoan lacking medusae; it reprodu
Cnidarians
Phylum Cnidaria includes jellyfish, corals, hydras and other organisms. They have simple diploblastic bodies with radial symmetry. They possess stinging capsules called cnidocytes that aid in defense and prey capture. Their bodies include a gastrovascular cavity with one opening that functions as both a mouth and anus. They exist either as polyps, which are cylindrical and attach to substrates, or medusae, which are bell-shaped and float freely. Some alternate between these forms while others possess only one. The four main classes are Hydrozoa, Scyphozoa, Cubozoa and Anthozoa, which differ in their predominant life stages and habitats.
Cnidarians
The document discusses the phylum Cnidaria, which includes animals like hydra, jellyfish, coral, and sea anemones. Cnidarians have radial symmetry, a gastrovascular cavity for digestion, and stinging cells called nematocysts. They can be either solitary polyps attached to the sea floor or free-swimming medusae. Corals secrete calcium carbonate cups and form coral reefs in warm, salty waters. Jellyfish are free-swimming cnidarians with an umbrella-shaped body.
Cnidarians
This document discusses the phylum Cnidaria, which includes jellyfish, corals, and hydroids. It has a diploblastic tissue organization and uses nematocysts and cnidocytes to capture prey or defend itself. The phylum contains three classes: Anthozoa including corals and sea anemones, Scyphozoa including jellyfish, and Hydrozoa including hydroids and the Portuguese Man-of-War. Examples of genera within each class are also provided.
Alternation of generation in cnideria
Alternation of generation is a life cycle exhibited by cnidarians where there are two main body forms - the asexual polyp form and the sexual medusa form. The polyp reproduces asexually to produce male or female medusae, which undergo sexual reproduction to produce larvae that develop into new polyps, completing the alternation of generations life cycle.
Cnidaria and ctenophora 2012
Cnidarians are a phylum of aquatic animals that date back approximately 700 million years. They display radial or biradial symmetry and tissue-level organization. Their body plans are simple sac-like structures with one opening for feeding and excretion. Cnidarians utilize stinging cells called nematocysts for defense and capturing prey. They also possess nerve nets, statocysts for balance, and in some cases simple light-sensing ocelli. Reproduction can occur sexually through larvae or asexually by budding. Major classes include Hydrozoa, Scyphozoa, Cubozoa, and Anthozoa. Coral reefs formed by cnidarians like hydroids, jellyfish
cnidera
Phylum Cnidaria includes jellyfish, sea anemones, corals and hydroids. They have radial or biradial symmetry, nerve nets, and use nematocysts for defense and prey capture. Their life cycles often involve both polyp and medusa stages. Phylum Ctenophora includes comb jellies which have colloblasts for prey capture and comb rows for swimming. They lack nematocysts and a polyp stage.
Phylum Coelenterata- Class Anthozoa
Skeltal features and classification of Class Anthozoa and brief explanation of the Orders comiing under them.
Phylum cnidaria
The phylum Cnidaria includes sea jellies, hydra, coral colonies, sea anemones, sea pens, and sea fans. They are characterized by having radial symmetry, two germ layers, a jelly-like mesoglea layer, an acoelomate body cavity, and specialized stinging cells called cnidocytes. Many species have both a sessile polyp stage and a free-swimming medusa stage. Cnidarians play important ecological roles through food sources, habitat, symbiosis, and wave protection.
Phylum Coelenterata
The document summarizes the phylum Coelenterata, which includes multicellular, radially symmetrical animals with needle cells. It describes three classes: Hydrozoa which have polyp and medusa forms like Obelia; Scyphozoa which are solitary marine medusoid forms like the four-chambered stomach jellyfish Aurelia; and Anthozoa which are marine polyp forms that can be solitary or colonial with septa in their gastrovascular cavity, including corals and sea anemones. It notes that corals form some of the most biodiverse ecosystems on Earth like the Great Barrier Reef.
Phylum coelenterata
This document summarizes key characteristics of cnidarians. It describes their three classes - Hydrozoa, Scyphozoa, and Anthozoa. Cnidarians are radially symmetric and have specialized cells. They live in water and have tentacles covered in stinging nematocysts that help capture prey. They reproduce both sexually and asexually, and different classes display different forms like polyps or medusae and move via jet propulsion or crawling.
Cnidaria
Phylum Cnidaria contains stinging cells called cnidocytes that contain nematocysts. They have a sac-like body plan with a gastrovascular cavity. Their life cycle involves both asexual and sexual phases - polyps can reproduce asexually while medusae are the sexual phase. Important classes include Scyphozoa, Cubozoa, Hydrozoa, and Anthozoa. Cnidarians are ecologically important as they provide habitat and protect coastlines with coral reefs.
Phylum Cnidaria
1. The document provides an overview of the phylum Cnidaria, which includes jellyfish, corals, and hydroids.
2. Cnidarians are radially or biradially symmetrical and have stinging cells called nematocysts. They exhibit a diploblastic body plan with two tissue layers separated by a gelatinous mesoglea.
3. Many cnidarians alternate between a sessile polyp stage and a motile medusa stage. Reproduction involves external fertilization producing a planula larva.
Phylum echinodermata 2016
Phylum Echinodermata includes sea stars, sea cucumbers, brittle stars, sea urchins, and sand dollars. They are radially symmetrical with a pentamerous body plan and have a water vascular system and endoskeleton. The phylum contains four classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), and Holothuroidea (sea cucumbers). Echinoderms are found on the ocean floor and have tube feet, spines or plates, and can regenerate lost body parts. Their water vascular system is unique and used for movement, structure, and respiration.
Class hydrozoa and anthozoa
The document summarizes key information about the class Hydrozoa. It belongs to the phylum Cnidaria and includes solitary or colonial organisms found mostly in marine environments. They have noncellular mesoglea and lack tentacles in their gastrovascular cavity. The document also provides details about two common orders - Hydroida and Siphonophora - including examples like the Portuguese man-of-war Physalia.
Coelenterates - classification and gen characters
Coelenterates are diploblastic animals with a radial or biradial symmetry and two tissue layers. They are divided into three phyla - Hydrozoa, Scyphozoa, and Anthozoa - based on their polyp and medusa forms. Hydrozoans have both polyp and medusa stages in their life cycle while scyphozoans are medusa-dominant and anthozoans are polyp-dominant. Cnidarians have stinging cells called nematocysts and a gastrovascular cavity that functions in digestion, circulation, and osmoregulation. They reproduce both sexually and asexually.
A cnidaria
Phylum Cnidaria includes animals such as jellyfish, sea anemones, corals, and Hydra. They have two main body forms: the polyp, which is tube-shaped and attached, and the medusa, which is umbrella-shaped and free-swimming. Cnidarians have stinging cells called nematocysts in their tentacles. They have radial symmetry and a simple tissue level of organization without organs. Most live in aquatic marine habitats and feed by stinging prey with their tentacles. Reproduction can occur sexually through medusa releasing eggs and sperm or asexually via budding. They play important ecological roles as predators, building coral reefs, and producing neurotoxins studied
Coelenterata general characters & classification
Coelenterata is a phylum of aquatic animals that includes jellyfish, corals, sea anemones and hydroids. They are diploblastic with two main cell layers, a gelatinous mesoglea in between, and stinging nematocysts. They exhibit radial or biradial symmetry and polymorphism. Reproduction can occur asexually through budding or sexually through external fertilization and a planula larva stage. The phylum is divided into three classes: Hydrozoa, Scyphozoa, and Anthozoa.
Cnidaria and ctneophora
This document summarizes the phyla Cnidaria and Ctenophora. Cnidaria includes jellyfish, corals, sea anemones and hydras. They have stinging cells called cnidocytes and can have a polyp or medusa body form. Ctenophora includes comb jellies and have rows of cilia used for locomotion. They lack specialized organ systems and reproduce via a free-swimming larval stage. Both phyla are marine and diploblastic, with tissues but no true organs. Cnidaria have nematocyst stinging cells and Ctenophora have comb rows of cilia.
Animal survey 2010
The document summarizes key characteristics and evolutionary trends of the animal kingdom. It describes six major characteristics of animals including being multicellular, heterotrophs, diploid, motile, having embryonic development, and lacking cell walls. It then discusses major evolutionary trends including increasing tissue complexity, symmetry, presence of gut/body cavities, and whether organisms are protostomes or deuterostomes. The document concludes by classifying the major phyla in the kingdom Animalia.
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13. class hydrozoa with clear explanation only on slide share free
Hydrozoans are a class of cnidarians that can live in both marine and freshwater environments. Most hydrozoans display alternation of generations, alternating between a polyp stage and a medusa stage, though some lack one stage. Obelia is a common marine hydrozoan that forms colonial polyps connected by a shared gastrovascular system. Its polyps specialize into gastrozooids for feeding and gonzooids for reproducing by budding off small medusae. Gonionemus is a hydrozoan where the medusa stage predominates, using jet propulsion and statocysts for swimming and navigation. Hydra is a freshwater hydrozoan lacking medusae; it reprodu
Cnidarians
Phylum Cnidaria includes jellyfish, corals, hydras and other organisms. They have simple diploblastic bodies with radial symmetry. They possess stinging capsules called cnidocytes that aid in defense and prey capture. Their bodies include a gastrovascular cavity with one opening that functions as both a mouth and anus. They exist either as polyps, which are cylindrical and attach to substrates, or medusae, which are bell-shaped and float freely. Some alternate between these forms while others possess only one. The four main classes are Hydrozoa, Scyphozoa, Cubozoa and Anthozoa, which differ in their predominant life stages and habitats.
Cnidarians
The document discusses the phylum Cnidaria, which includes animals like hydra, jellyfish, coral, and sea anemones. Cnidarians have radial symmetry, a gastrovascular cavity for digestion, and stinging cells called nematocysts. They can be either solitary polyps attached to the sea floor or free-swimming medusae. Corals secrete calcium carbonate cups and form coral reefs in warm, salty waters. Jellyfish are free-swimming cnidarians with an umbrella-shaped body.
Cnidarians
This document discusses the phylum Cnidaria, which includes jellyfish, corals, and hydroids. It has a diploblastic tissue organization and uses nematocysts and cnidocytes to capture prey or defend itself. The phylum contains three classes: Anthozoa including corals and sea anemones, Scyphozoa including jellyfish, and Hydrozoa including hydroids and the Portuguese Man-of-War. Examples of genera within each class are also provided.
Alternation of generation in cnideria
Alternation of generation is a life cycle exhibited by cnidarians where there are two main body forms - the asexual polyp form and the sexual medusa form. The polyp reproduces asexually to produce male or female medusae, which undergo sexual reproduction to produce larvae that develop into new polyps, completing the alternation of generations life cycle.
Cnidaria and ctenophora 2012
Cnidarians are a phylum of aquatic animals that date back approximately 700 million years. They display radial or biradial symmetry and tissue-level organization. Their body plans are simple sac-like structures with one opening for feeding and excretion. Cnidarians utilize stinging cells called nematocysts for defense and capturing prey. They also possess nerve nets, statocysts for balance, and in some cases simple light-sensing ocelli. Reproduction can occur sexually through larvae or asexually by budding. Major classes include Hydrozoa, Scyphozoa, Cubozoa, and Anthozoa. Coral reefs formed by cnidarians like hydroids, jellyfish
cnidera
Phylum Cnidaria includes jellyfish, sea anemones, corals and hydroids. They have radial or biradial symmetry, nerve nets, and use nematocysts for defense and prey capture. Their life cycles often involve both polyp and medusa stages. Phylum Ctenophora includes comb jellies which have colloblasts for prey capture and comb rows for swimming. They lack nematocysts and a polyp stage.
Phylum Coelenterata- Class Anthozoa
Skeltal features and classification of Class Anthozoa and brief explanation of the Orders comiing under them.
Phylum cnidaria
The phylum Cnidaria includes sea jellies, hydra, coral colonies, sea anemones, sea pens, and sea fans. They are characterized by having radial symmetry, two germ layers, a jelly-like mesoglea layer, an acoelomate body cavity, and specialized stinging cells called cnidocytes. Many species have both a sessile polyp stage and a free-swimming medusa stage. Cnidarians play important ecological roles through food sources, habitat, symbiosis, and wave protection.
Phylum Coelenterata
The document summarizes the phylum Coelenterata, which includes multicellular, radially symmetrical animals with needle cells. It describes three classes: Hydrozoa which have polyp and medusa forms like Obelia; Scyphozoa which are solitary marine medusoid forms like the four-chambered stomach jellyfish Aurelia; and Anthozoa which are marine polyp forms that can be solitary or colonial with septa in their gastrovascular cavity, including corals and sea anemones. It notes that corals form some of the most biodiverse ecosystems on Earth like the Great Barrier Reef.
Phylum coelenterata
This document summarizes key characteristics of cnidarians. It describes their three classes - Hydrozoa, Scyphozoa, and Anthozoa. Cnidarians are radially symmetric and have specialized cells. They live in water and have tentacles covered in stinging nematocysts that help capture prey. They reproduce both sexually and asexually, and different classes display different forms like polyps or medusae and move via jet propulsion or crawling.
Cnidaria
Phylum Cnidaria contains stinging cells called cnidocytes that contain nematocysts. They have a sac-like body plan with a gastrovascular cavity. Their life cycle involves both asexual and sexual phases - polyps can reproduce asexually while medusae are the sexual phase. Important classes include Scyphozoa, Cubozoa, Hydrozoa, and Anthozoa. Cnidarians are ecologically important as they provide habitat and protect coastlines with coral reefs.
Phylum Cnidaria
1. The document provides an overview of the phylum Cnidaria, which includes jellyfish, corals, and hydroids.
2. Cnidarians are radially or biradially symmetrical and have stinging cells called nematocysts. They exhibit a diploblastic body plan with two tissue layers separated by a gelatinous mesoglea.
3. Many cnidarians alternate between a sessile polyp stage and a motile medusa stage. Reproduction involves external fertilization producing a planula larva.
Phylum echinodermata 2016
Phylum Echinodermata includes sea stars, sea cucumbers, brittle stars, sea urchins, and sand dollars. They are radially symmetrical with a pentamerous body plan and have a water vascular system and endoskeleton. The phylum contains four classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), and Holothuroidea (sea cucumbers). Echinoderms are found on the ocean floor and have tube feet, spines or plates, and can regenerate lost body parts. Their water vascular system is unique and used for movement, structure, and respiration.
Class hydrozoa and anthozoa
The document summarizes key information about the class Hydrozoa. It belongs to the phylum Cnidaria and includes solitary or colonial organisms found mostly in marine environments. They have noncellular mesoglea and lack tentacles in their gastrovascular cavity. The document also provides details about two common orders - Hydroida and Siphonophora - including examples like the Portuguese man-of-war Physalia.
Coelenterates - classification and gen characters
Coelenterates are diploblastic animals with a radial or biradial symmetry and two tissue layers. They are divided into three phyla - Hydrozoa, Scyphozoa, and Anthozoa - based on their polyp and medusa forms. Hydrozoans have both polyp and medusa stages in their life cycle while scyphozoans are medusa-dominant and anthozoans are polyp-dominant. Cnidarians have stinging cells called nematocysts and a gastrovascular cavity that functions in digestion, circulation, and osmoregulation. They reproduce both sexually and asexually.
A cnidaria
Phylum Cnidaria includes animals such as jellyfish, sea anemones, corals, and Hydra. They have two main body forms: the polyp, which is tube-shaped and attached, and the medusa, which is umbrella-shaped and free-swimming. Cnidarians have stinging cells called nematocysts in their tentacles. They have radial symmetry and a simple tissue level of organization without organs. Most live in aquatic marine habitats and feed by stinging prey with their tentacles. Reproduction can occur sexually through medusa releasing eggs and sperm or asexually via budding. They play important ecological roles as predators, building coral reefs, and producing neurotoxins studied
Coelenterata general characters & classification
Coelenterata is a phylum of aquatic animals that includes jellyfish, corals, sea anemones and hydroids. They are diploblastic with two main cell layers, a gelatinous mesoglea in between, and stinging nematocysts. They exhibit radial or biradial symmetry and polymorphism. Reproduction can occur asexually through budding or sexually through external fertilization and a planula larva stage. The phylum is divided into three classes: Hydrozoa, Scyphozoa, and Anthozoa.
Cnidaria and ctneophora
This document summarizes the phyla Cnidaria and Ctenophora. Cnidaria includes jellyfish, corals, sea anemones and hydras. They have stinging cells called cnidocytes and can have a polyp or medusa body form. Ctenophora includes comb jellies and have rows of cilia used for locomotion. They lack specialized organ systems and reproduce via a free-swimming larval stage. Both phyla are marine and diploblastic, with tissues but no true organs. Cnidaria have nematocyst stinging cells and Ctenophora have comb rows of cilia.
Animal survey 2010
The document summarizes key characteristics and evolutionary trends of the animal kingdom. It describes six major characteristics of animals including being multicellular, heterotrophs, diploid, motile, having embryonic development, and lacking cell walls. It then discusses major evolutionary trends including increasing tissue complexity, symmetry, presence of gut/body cavities, and whether organisms are protostomes or deuterostomes. The document concludes by classifying the major phyla in the kingdom Animalia.
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Cnidarians are radially symmetrical aquatic animals with stinging cells called cnidocytes. They have two main body forms - polyps and medusae. Cnidarians include jellyfish, hydras, sea anemones, and corals. They are diploblastic with two tissue layers and a jelly-like mesoglea in between. Cnidarians capture prey using stinging tentacles and digest food in their gastrovascular cavity. They play an important economic role by creating coral reef habitats for fish and generating oxygen from algae.
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The document discusses Tumblr, including how it works, who it is for, site usage, threats to its creative freedom, and some fun facts. It encourages readers to click a link to learn more about how Tumblr works and guides influential creators to success on the platform. It states Tumblr is for everyone and shares keyboard shortcuts for navigating the site.
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Poriferans are classified into three main classes based on the composition of their spicules:
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cnidarians.pptx
Cnidarians are a phylum of aquatic animals that include jellyfish, corals, sea anemones. They have radial symmetry and tentacles surrounding a central mouth. Their bodies are made of two layers and they use stinging cells called cnidocytes for defense and hunting. Cnidarians reproduce both sexually and asexually. They play important ecological roles like building coral reefs but some species' stings can harm humans.
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The document discusses the Search for Extraterrestrial Intelligence (SETI) project which searches outer space for signs of life. It notes that the US spends millions of dollars annually on SETI to search for aliens. It then asks if readers believe in the possibility of aliens and asserts that there may be aliens on other planets in the universe given the vast number of solar systems.
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Cnidarians are soft-bodied animals with stinging cells that have two main forms in their life cycle, polyp and medusa. They have a gastrovascular cavity for digestion where food is pulled inside and broken down outside cells. Major groups include jellyfish, hydras, sea anemones, and corals, which all move using hydrostatic skeletons and muscles.
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The document is a cnidarian introducing itself and describing its attributes. It notes that it is radially symmetrical and lives in aquatic environments. It feeds on prey using specialized stinging cells called nematocysts located on its tentacles. It can reproduce both sexually by releasing eggs and sperm into water, and asexually by budding.
Class 11 Important Questions for Biology - Kingdom Animalia
Here you can get Class 11 Important Questions for Biology based on NCERT Textbook for Class XI. Biology Class 11 Important Questions are very helpful to score high marks in board exams. Here we have covered Important Questions on Kingdom Animalia for Class 11 Biology subject.
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Porifera, also known as sponges, are simple aquatic animals with porous bodies and no true tissues. They feed through pores and have cells that perform specialized functions. There are over 8,000 known species of marine and freshwater sponges that vary greatly in size, shape, and skeleton composition. Sponges are classified into three main classes: Calcarea, Hexactinellida, and Demospongiae.
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The document summarizes key facts about the phylum Chelicerata. Chelicerates are characterized by having eight legs, segmented bodies, and either pincers or fangs. They reproduce both sexually and asexually. Their digestive and circulatory systems vary depending on whether they live on land or sea. Chelicerates can be found in a variety of environments and range in size, with some being predators and others parasites that can harm humans. There are over 77,000 known species of chelicerates.
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This document provides an overview of sponges and cnidarians. It discusses their distinguishing features, basic body structures, and evolutionary histories. Sponges are multicellular organisms that lack tissues and have pores to intake and output water. Cnidarians are diploblastic animals with stinging cells that have two main layers and feed through predation or symbiosis. Both groups have a long fossil record dating back hundreds of millions of years.
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Cnidaria
- 1. Cnidaria
- 4. Anthozoa coral Sea pen Anemone
- 5. Hydrozoa
- 6. Scyphozoa Cubozoa back
- 7. For the billionth time… Radial symmetry... IN ACTION! back
- 8. back
- 9. Nematocyst
- 11. >