Shark’s power point final
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Sharks have existed for over 420 million years, predating dinosaurs. They have powerful jaws that can move both vertically and horizontally. While some sharks hunt alone, the presence of one feeding shark can attract others to feed as well. The largest shark species like the whale shark and basking shark are filter feeders rather than predators. Great white sharks, tiger sharks, hammerheads, and bull sharks are among the most dangerous predatory sharks. Sharks have highly developed senses, with two-thirds of their brain dedicated to smell, vibration detection, and electromagnetic field detection, which helps them hunt prey efficiently.
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Sharks have cartilaginous skeletons and extract oxygen from seawater through five to seven gill slits. They have replaceable teeth and a dermal layer of denticles to protect their skin. Sharks have evolved over 450 million years, with their fossilized teeth commonly found due to their rapid replacement throughout life. Reproduction involves internal fertilization and females may have thicker skin to withstand bites from males during mating. Sharks rely on their senses of smell, sight, and hearing to hunt prey, using their ampullae of Lorenzini to detect electric fields, tapetum lucidum to see in dark waters, and sharp hearing to detect sounds from miles away.
Hammerhead sharks
Hammerhead sharks are distinguished by their hammer-shaped heads. There are eight species that inhabit coastal waters around the world to depths of 300 meters. They are highly social and communicate through body movements. Hammerheads have wide-set eyes and nostrils on their hammer-shaped heads which help them hunt prey like fish, sharks, stingrays, and invertebrates. Their unusual head shape provides maneuverability for restraining prey. Overfishing threatens hammerhead populations due to their slow reproduction rates.
Shark powerpoint
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Bull sharks are considered the most dangerous sharks in the world by many experts because they are an aggressive species that tends to hunt in shallow, warm waters along tropical shorelines where humans often swim. While humans are not usually part of a bull shark's diet, scientists believe these large sharks may attack people out of curiosity or by mistaking them for prey, and bull sharks can grow up to 11.5 feet in length as they hunt both during the day and at night.
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Shark Presentation
Sharks have cartilaginous skeletons and extract oxygen from seawater through five to seven gill slits. They have replaceable teeth and a dermal layer of denticles to protect their skin. Sharks have evolved over 450 million years, with their fossilized teeth commonly found due to their rapid replacement throughout life. Reproduction involves internal fertilization and females may have thicker skin to withstand bites from males during mating. Sharks rely on their senses of smell, sight, and hearing to hunt prey, using their ampullae of Lorenzini to detect electric fields, tapetum lucidum to see in dark waters, and sharp hearing to detect sounds from miles away.
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This document provides information about sharks, including their skeleton, respiration system, characteristics, attacks on humans, and the practice of shark fin soup. It notes that sharks have a cartilaginous skeleton that is lighter than bone, helping them move efficiently in water. They breathe by taking in water over their gills. While most shark attacks are exploratory, some species are more likely to attack in warm, shallow waters near groups of people. The demand for shark fin soup has led to overfishing and finning, where sharks have their fins cut off while still alive.
Power point bull sharks
Bull sharks are considered the most dangerous sharks in the world by many experts because they are an aggressive species that tends to hunt in shallow, warm waters along tropical shorelines where humans often swim. While humans are not usually part of a bull shark's diet, scientists believe these large sharks may attack people out of curiosity or by mistaking them for prey, and bull sharks can grow up to 11.5 feet in length as they hunt both during the day and at night.
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Sharks are an ancient species of fish that have existed since before dinosaurs. They live in oceans worldwide and come in a variety of sizes, from the smallest only a few inches long to the largest whale shark which can reach 50 feet. Great white sharks are one of the largest predatory sharks and have specialized abilities like a powerful bite and ability to swim quickly. While they can attack humans, scientists believe great whites often mistake people for their normal prey of seals and do not typically view humans as food.
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The document presents information about 10 different shark species, ranking them based on their threat level to humans. It finds that the Bull Shark is the most dangerous to humans, having attacked over 250 people, of which over 100 were fatal. The Great White Shark, ranked second, has attacked 116 people with 67 fatalities. Meanwhile, sharks like the Lemon Shark and Oceanic Whitetip Shark have not been responsible for any recorded human deaths.
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Sharks have been around for a long time, even before dinosaurs. While they live primarily in the ocean, some species can also be found in rivers and lakes. Sharks vary greatly in size, from just a few inches long to larger than buses. They have rows of replacement teeth for catching prey, rather than chewing food. Though they do not actively sleep, sharks do have periods of rest. While not normally dangerous to humans, sharks may occasionally bite people who enter their habitat. Their skin is covered in sharp scales called denticles instead of being smooth. Individual shark species have different diets, ranging from fish to shellfish to other sharks. Sharks face threats from overfishing by humans. One extinct species was
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1. The document discusses three types of marine fishes: jawless fish (hagfish and lampreys), cartilaginous fish (sharks, skates, rays, and chimaeras), and bony fish.
2. Hagfish feed by grabbing prey with tooth-like plates and drawing it into their mouth, while lampreys use plates to grasp, rasp, and suck fluids from victims.
3. Cartilaginous fishes have skeletons of cartilage, placoid scales, and rows of teeth on their jaws. Sharks are excellent swimmers but must keep moving to avoid sinking, while skates and rays have flattened bodies and enlarged pectoral fins adapted for bottom feeding.
Presentación animales marinos ilustrada azul _20231122_090918_0000.pdf
Dolphins evolved from land mammals and still retain some characteristics of land animals today such as fingers on their fins, nursing their young, and the ability to breathe air. They have highly developed hearing and communication skills. A curious fact is that dolphins can sleep with half their brain at a time, keeping one eye open for threats while resting the other half. They form groups of up to hundreds and have excellent hearing and group behavior.
Amphibians
Amphibians live both in water and on land, and undergo metamorphosis from aquatic tadpoles to terrestrial adults. There are over 6,000 known amphibian species including frogs, toads, salamanders, and caecilians. While amphibians first appeared 370 million years ago, many species are now endangered or extinct due to habitat loss and other threats.
Fish 10 4 donev yaramov yanev
The document discusses various types of fish, including their anatomy, movement, breathing, and reproduction. It provides facts about specific fish such as sharks, catfish, and sprat. It also includes fun facts about fish behavior and the oldest recorded goldfish.
Whales
This document is a presentation about whales that provides information over 10 chapters. It discusses where whales live in oceans around the world, what whales eat such as fish, seals and other whales, includes diagrams of whales and their internal anatomy, lists different types of whales, discusses predators of whales like sharks and humans, shares fun facts, and concludes with a video of a humpback whale.
E.s
This document is a presentation about whales that provides information over 10 chapters. It discusses where whales live in oceans around the world, what whales eat such as fish, seals and other whales, includes diagrams of whales and their internal anatomy, lists different types of whales, discusses predators of whales like sharks and humans, shares fun facts, and concludes with a video of a humpback whale.
Whales
This document is a presentation about whales that provides information over 10 chapters. It discusses where whales live in oceans around the world, what whales eat such as fish, seals and other whales, includes diagrams of whales and their internal anatomy, lists different types of whales, discusses predators of whales like sharks and humans, shares fun facts, and concludes with a video of a humpback whale.
Orca (killer wale)
Killer whales, also known as orcas, are highly intelligent apex predators found in oceans around the world. They live in family pods that are led by the oldest females and can include up to four generations. While highly social, pods do not interbreed with closely related whales. Killer whales communicate using distinct dialects and vocalizations. Though fearsome hunters, there are no recorded wild killer whale attacks on humans. However, whales in captivity face serious health and behavioral issues due to the stressful conditions of captivity.
The Vampire Squid
The vampire squid has survived since prehistoric times due to its ability to thrive in extreme ocean depths where oxygen levels are very low. It has a low metabolism and weak musculature that allow it to go long periods without food in its low-oxygen environment. It can also generate bioluminescent light to distract predators and has large, sensitive eyes adapted to the darkness of its deep-sea habitat. As the only surviving member of its taxonomic order, the vampire squid offers insights into the evolution of cephalopods.
Similar to Shark’s power point final (20)
Presentación animales marinos ilustrada azul _20231122_090918_0000.pdf
Presentación animales marinos ilustrada azul _20231122_090918_0000.pdf
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