Q. XII Long answer type questions.
1) What are aquatic animals? How is a fish adapted to live in water?
Answers
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1
Answer:
An aquatic animal is an animal, either vertebrate or invertebrate, which lives in the water for most or all of its lifetime.
-Fish have gills that allow them to “breathe” oxygen in water.
-Water enters the mouth, passes over the gills, and exits the body through a special opening.
- Gills absorb oxygen from the water as it passes over them.
-Most fish have a swim bladder.
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2
Explanation:
The streamlined body shape helps the fish to move through the water easily (because such a shape offers least resistance to motion). (2) The fish has special organs called “gills” which-help it to absorb oxygen-dissolved in water for breathing. A fish can live in water only because it is adapted to breathe in water.
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