Amphibians
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Amphibians are vertebrates that spend part of their life in water and part on land. They evolved from lobe-finned fish around 350 million years ago. Amphibians have adaptations for both aquatic and terrestrial environments like the ability to hibernate, estivate, and lay eggs in water that hatch into larvae. Common types of amphibians include frogs with short bodies and long back legs for jumping, toads with thick warty skin that live on land, and salamanders with slender bodies that hide under debris.
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Frogs and toads
Frogs and toads are both amphibians that live on land as adults after being born as tadpoles in water, but frogs have slimy skin, webbed feet for jumping and swimming, and live near water while toads have dry, warty skin, shorter legs for walking on land, and live farther from water. The document provides information about the differences and similarities between frogs and toads through a Venn diagram activity for students.
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Frog vs toad
Frogs have smooth skin that always looks wet, they lose moisture easily so are usually found near water, and have long legs and webbed feet that allow them to jump. Toads have rough, dry skin with warts, their skin is more waterproof so they can live farther from water, and they have shorter legs so they hop rather than jump and have broader features with a dumpy appearance.
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Reptiles were the first terrestrial vertebrates and dominated during the Mesozoic era. There are around 7,000 reptile species worldwide today, with the most successful group being squamates (snakes and lizards). Reptiles are characterized by scaly skin, laying amniotic eggs, and various anatomical adaptations for living on land such as efficient lungs and kidneys. The four surviving orders are squamates, crocodilians, turtles, and the tuatara; turtles are notable for their protective shells.
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Vertebrate animals have a backbone and are classified as mammals, birds, fish, reptiles, and amphibians. Reptiles such as turtles, crocodiles, and snakes have scales and are mostly terrestrial. They have four limbs, though snakes do not have legs. Most reptiles have teeth and some use venom fangs. Reptiles breathe through lungs and have body temperatures that vary with their environment. They lay eggs but do not incubate them.
Amphibians
Amphibians are vertebrates that live both on land and in water. They are classified into three orders: Anura (frogs and toads), Caudata (salamanders and newts), and Apoda (caecilians). Amphibians are ectothermic, have permeable skin, lay eggs, and undergo metamorphosis from aquatic larvae to terrestrial adults. Each order has distinct characteristics - Anura live in moist areas and catch insects with their tongues, Caudata live in water and can regenerate limbs, and Apoda are worm-like and blind burrowers.
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Frogs have smooth skin that always looks wet, they lose moisture easily so are usually found near water, and have long legs and webbed feet that allow them to jump. Toads have rough, dry skin with warts, their skin is more waterproof so they can live farther from water, and they have shorter legs so they hop rather than jump and have broader features with a dumpy appearance.
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Vertebrate animals have a backbone and are classified as mammals, birds, fish, reptiles, and amphibians. Reptiles such as turtles, crocodiles, and snakes have scales and are mostly terrestrial. They have four limbs, though snakes do not have legs. Most reptiles have teeth and some use venom fangs. Reptiles breathe through lungs and have body temperatures that vary with their environment. They lay eggs but do not incubate them.
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Amphibians are vertebrates that live both on land and in water. They are classified into three orders: Anura (frogs and toads), Caudata (salamanders and newts), and Apoda (caecilians). Amphibians are ectothermic, have permeable skin, lay eggs, and undergo metamorphosis from aquatic larvae to terrestrial adults. Each order has distinct characteristics - Anura live in moist areas and catch insects with their tongues, Caudata live in water and can regenerate limbs, and Apoda are worm-like and blind burrowers.
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Amphibians use their skin for respiration and some small species rely entirely on their skin for breathing. They reproduce in water and have permeable skin, making them sensitive to environmental changes. Amphibians evolved from sarcopterygian fish in the Devonian period and inhabit a variety of terrestrial, fossorial, arboreal, and freshwater habitats, starting as larvae in water and undergoing metamorphosis to air-breathing adults on land for most species.
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Amphibians live both on land and in water. They undergo metamorphosis from egg to aquatic larvae to adult with lungs and limbs. Amphibians reproduce sexually by laying eggs in moist environments that develop into larvae with gills. Common UK amphibians include toads, frogs, and newts that live near water and eat insects, worms and other invertebrates.
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Amphibians live both on land and in water, having thin skin that allows absorption of water and oxygen. They go through a metamorphosis where larvae with gills transform into adults with lungs on land. While amphibians were the first to move onto land, reptiles later evolved with thicker scaly skin and shells for their eggs, allowing full adaptation to life on land.
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Frogs are amphibians that are cold-blooded vertebrates known for their distinctive ribbit call. They have scale-less skin, webbed feet, and live in a variety of habitats around the world. Frogs go through distinct life cycle stages from egg to tadpole to adult frog. They have over 3,000 different species that vary widely in size, coloration, diet and habitat, such as poison dart frogs, Goliath frogs, and wood frogs.
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Amphibians such as frogs, toads, and salamanders spend their early life in water and their adult life on land. They have adaptations like camouflage, legs, and lungs that allow them to live on both land and water. However, amphibians are sensitive to environmental changes and facing threats due to habitat loss, pollution, and other factors.
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Amphibians can live both on land and in water, having evolved from lobe-finned fish. Frogs are a type of amphibian that undergo a metamorphosis from an aquatic larval stage to a terrestrial adult. As cold-blooded animals, frogs have adaptations like thin, moist skin and the ability to hibernate or estivate to survive in changing environments.
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Amphibians are a class of animals like reptiles, mammals, and birds. They live the first part of their lives in the water and the last part on the land. When they hatch from their eggs, amphibians have gills so they can breathe in the water. They also have fins to help them swim, just like fish. Later, their bodies change, growing legs and lungs enabling them to live on the land. The word "amphibian" means two-lives, one in the water and one on land.
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Amphibians are vertebrates that live in water as larvae and on land as adults. They have moist skin without scales or claws. There are three types of amphibians: salamanders, frogs and toads, and caecilians. Amphibians evolved to live partially on land by developing stronger bones, lungs, and breathing tubes. They can breathe through their skin but some live on land for more available food. Amphibians have external fertilization and undergo metamorphosis from embryo to adult. Frogs jump while toads prefer land. Salamanders and newts have different skin textures. Axolotls never develop lungs while caecilians resemble worms and live underground.
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Amphibians use their skin for respiration and some small species rely entirely on their skin for breathing. They reproduce in water and have permeable skin, making them sensitive to environmental changes. Amphibians evolved from sarcopterygian fish in the Devonian period and inhabit a variety of terrestrial, fossorial, arboreal, and freshwater habitats, starting as larvae in water and undergoing metamorphosis to air-breathing adults on land for most species.
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Amphibians are vertebrates that can live both on land and in water. They go through a metamorphosis from an aquatic tadpole stage to a terrestrial adult stage. Amphibians are important for ecosystems and human welfare. They indicate environmental changes and provide benefits like controlling pests, serving as traditional medicine, and acting as biological indicators. India is home to 309 amphibian species across 14 families and 55 genera. Ongoing research in India includes studies on reproduction, taxonomy, ecology, and impacts of skin extracts. Conservation efforts aim to protect amphibian habitats and diversity in the Western Ghats.
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The document describes several different animals:
- The cobalt blue tarantula, which has blue legs and lives in southeast Asian rainforests.
- The blue-ringed octopus, which is small but highly venomous and lives in tide pools from Japan to Australia.
- The Christmas beetle of Australia, which appears around Christmas and has a lifecycle that involves egg-laying and larvae living in soil.
- Several other invertebrates like butterflies, sponges, anemones, jellyfish, starfish, and praying mantises.
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Amphibians live both on land and in water. They undergo metamorphosis from egg to aquatic larvae to adult with lungs and limbs. Amphibians reproduce sexually by laying eggs in moist environments that develop into larvae with gills. Common UK amphibians include toads, frogs, and newts that live near water and eat insects, worms and other invertebrates.
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Amphibians live both on land and in water, having thin skin that allows absorption of water and oxygen. They go through a metamorphosis where larvae with gills transform into adults with lungs on land. While amphibians were the first to move onto land, reptiles later evolved with thicker scaly skin and shells for their eggs, allowing full adaptation to life on land.
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Amphibians such as frogs, toads, and salamanders spend their early life in water and their adult life on land. They have adaptations like camouflage, legs, and lungs that allow them to live on both land and water. However, amphibians are sensitive to environmental changes and facing threats due to habitat loss, pollution, and other factors.
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This document summarizes the major groups of reptiles. It describes five orders: Sauria (lizards), Serpentes (snakes), Testudines (turtles), Crocodylia (crocodiles), and Rhynchocephalia (tuataras). It provides key characteristics of reptiles such as having scaly skin, laying amniotic eggs, and being ectothermic. Additionally, it highlights unique features of different reptile groups, including snakes' specialized anatomy for swallowing large prey whole and crocodiles guarding nests until hatchlings emerge.
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Amphibians can live both on land and in water, having evolved from lobe-finned fish. Frogs are a type of amphibian that undergo a metamorphosis from an aquatic larval stage to a terrestrial adult. As cold-blooded animals, frogs have adaptations like thin, moist skin and the ability to hibernate or estivate to survive in changing environments.
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Amphibians are a class of vertebrate animals that live both on land and in water. They have moist skin, four limbs, undergo metamorphosis from an aquatic larval stage to a terrestrial adult stage, and include frogs, salamanders and caecilians. The largest orders are Anura (frogs), Urodela (salamanders), and Gymnophiona (legless caecilians). Amphibians play an important role in ecosystems and some species are used in medical research.
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- Insects have six legs, three body parts, an exoskeleton, one or two pairs of wings, are cold-blooded and lay many eggs.
- Mammals are intelligent,
Classification of animals
This document classifies and describes the key characteristics of vertebrates and invertebrates. Vertebrates include mammals, fish, reptiles, birds and amphibians, and can be found around the world. They are divided into groups based on traits like whether they lay eggs, have feathers or fur, breathe through lungs or gills, and how they regulate their body temperature. Invertebrates make up 97% of animal species and lack backbones, including insects, worms, sponges, jellyfish, starfish, mollusks and arthropods. They are grouped by their exoskeleton, body structure and environment.
different reptiles in oriya laguage.pdf
Reptiles are defined as vertebrate animals with dry scaly skin that lay soft-shelled eggs on land, including snakes, lizards, turtles, and tortoises. They have changed little from their first appearance over 200 million years ago. Turtles have a protective shell covering their body that provides camouflage and is composed of two parts. The earliest known proto-reptiles originated around 312 million years ago and evolved from tetrapods adapted to life on dry land. Reptiles produce amniotic eggs with membranes and shells that help prevent drying out and allowed them to be the first vertebrates to adapt to life on land.
Amphibians.
Amphibians were the first vertebrates to adapt to life on land around 350 million years ago. They preceded plants and insects. While not fully land-adapted, amphibians fill an important evolutionary niche between fish and reptiles. The earliest amphibians arose from lobe-finned fish and had characteristics like strong fins that helped with movement on land. Amphibians later diversified into three main orders - frogs/toads, salamanders/newts, and caecilians - adapting to both aquatic and terrestrial environments.
phylum Chordata
This document provides an overview of the phylum Chordata, which includes animals with a notochord, dorsal nerve cord, pharynx with gill slits, and postanal tail at some point in their lifecycle. It describes the three subphyla: Urochordata (tunicates), Cephalochordata (lancelets), and Vertebrata (jawless and jawed fish, amphibians, reptiles, birds, and mammals). Key characteristics and examples are given for each class within these groups.
Amphibians
This lesson is all about amphibians. This lesson also covers how amphibians are classified into 3 groups: Anura, Caudata, & Gymnophiona. Also, this lesson concludes with the roles amphibians play in our ecosystems, ways we can help, population declination, with a summary to wrap it up.
Anurans
This document discusses the key characteristics of anurans (frogs):
- They lack tails as adults and have legs suited for jumping. Their highly permeable skin allows for respiration.
- Frogs are classified into 3 suborders and have diverse morphologies but generally have short vertebral columns and lack tails.
- Their skin, feet, digestive and reproductive systems show adaptations for respiration, locomotion and breeding in various environments.
Animal Classification (Grade 5)
This document provides an overview of different animal classifications including:
- Poriferans and cnidarians which are simple marine animals without backbones or complex tissues.
- Echinoderms which move via tube feet and often have spiny coverings.
- Annelids which are segmented worms.
- Mollusks which often have a protective shell and move using a foot.
- Arthropods which have a hard exoskeleton and undergo metamorphosis.
- Fish and other aquatic vertebrates which breathe through gills and have fins.
- Amphibians which can live on land and water and undergo metamorphosis from eggs to adults.
- Rept
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Amphibians
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