Answer the following questions:
1. Name four aquatic mammals.
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2. How do fish get oxygen to breathe?
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3. How do sharks differ from other fish?
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4. Write two body adaptations of waterfowl.
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5. Why are dolphins and whales not considered fish?
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Answers
Answer:
1::::
1: seals
2: whales
3: sea lions
4: walrus
2::::::
Fish breathe with their gills, and they need a constant supply of oxygen. Gills sit under the operculum. This is called the gill slit. Many fish have four pairs of gills, while sharks may have up to seven.
3::::::
But how is a shark different from other kinds of fish? ... A shark is covered in sharp, toothlike scales called denticles. Most other fish have just one gill slit—an organ for breathing—on each side of the body. A shark has five, six, or even seven gill slits on each side.
4::::::
Ducks belong to the waterfowl, family. Ducks are smaller than geese and swans, but are more prolific; they live in more places throughout the world and often dominate waterfowl populations. They live in lakes, streams, rivers, creeks, bays, seas and oceans. Ducks as a group have several adaptations, and individual species of ducks possess further adaptations unique to their habits and habitats.
5::::::
Dolphins are mammals, not fish.
Like every mammal, dolphins are warm blooded. Unlike fish, who breathe through gills, dolphins breathe air using lungs. Dolphins must make frequent trips to the surface of the water to catch a breath. ... Whales and porpoises are also mammals.
Explanation:
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Answer:
1::::
1: seals
2: whales
3: sea lions
4: walrus
2::::::
Fish breathe with their gills, and they need a constant supply of oxygen. Gills sit under the operculum. This is called the gill slit. Many fish have four pairs of gills, while sharks may have up to seven.
3::::::
But how is a shark different from other kinds of fish? ... A shark is covered in sharp, toothlike scales called denticles. Most other fish have just one gill slit—an organ for breathing—on each side of the body. A shark has five, six, or even seven gill slits on each side.
4::::::
Ducks belong to the waterfowl, family. Ducks are smaller than geese and swans, but are more prolific; they live in more places throughout the world and often dominate waterfowl populations. They live in lakes, streams, rivers, creeks, bays, seas and oceans. Ducks as a group have several adaptations, and individual species of ducks possess further adaptations unique to their habits and habitats.
5::::::
Dolphins are mammals, not fish.
Like every mammal, dolphins are warm blooded. Unlike fish, who breathe through gills, dolphins breathe air using lungs. Dolphins must make frequent trips to the surface of the water to catch a breath. ... Whales and porpoises are also mammals.
Explanation:
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