Give reasons. 1. Chameleons can change their colour. 2. Some snails have a hard, round shell on their body. 3. Earthworms wriggle or crawl.
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Answers
Answer:
1 . Chameleons can change their colour.
While they can make small color adjustments to blend in to their background, usually, chameleons change color to reflect their moods, defend their territory or attract mates. Chameleons have the ability to change color because they have special skin cells called chromatophores.
2. Some snails have a hard, round shell on their body.
Snails are, in fact, born with shells, but they don't initially look like how you might imagine them. As the snail continues to grow, its shell grows with it. The snail produces new shell material, like the soft material of its protoconch, that expands its shell and then hardens.
3. Earthworms wriggle or crawl.
After a spring or summer North Carolina thunderstorm, it's not uncommon to see earthworms crawling on sidewalks and other hard surfaces. While earthworms can move through soil underground, they are able to move longer distances on top of the soil.
Answer:
(1) Since chameleons can't generate their own body heat, changing the color of their skin is a way to maintain a favorable body temperature. A cold chameleon may become dark to absorb more heat, whereas a hotter chameleon may turn pale to reflect the sun's heat. Chameleons will also use bold color changes to communicate
(2) As the snail grows, so does its calcium carbonate shell. The shell grows additively, by the addition of new calcium carbonate, which is secreted by glands located in the snail's mantle.
(3)Oxygen diffuses easily through air, and the soil stays aerobic because oxygen comes in from the surface.” But after a rain, the soil pores and the worm burrows fill with water. ... “The worms can't get enough oxygen when the soil is flooded, so they come to the surface to breathe.”
Explanation:
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