Question

(a) why does a cockroach die when put in water
(b) why do whales and dolphins often come to the surface of water and release a fountain of water ​

Answer 1

a)When there's a low need for oxygen, cockroaches close their spiracles. This regulates water loss, so precious water vapor within their bodies won't be expelled. ... The headless roach will eventually die because it can't eat or drink without its mouth.

b)Whales and dolphins belongs to same category. They both can come up to the surface of water or ocean and also ejects the stream of water wile moving upwards. This is mainly because they tend to breathe the fresh air and ejects carbon dioxide. ... And when they breathe air out of it, it appears like a fountain of water.

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Answer 2

Answer:

(a) answer - when there's a low need for oxygen roaches close their spiracles.this regulates water loss so precious water vapour within their bodies won't be expelled ,.the headless roach will eventually die because it can't eat or drink without its mouth .

(b) answer - whales and dolphins belongs to same category. they both can come up to the surface of water or ocean and also ejects the stream of water while moving upwards. this is mainly because they tend to breath the fresh air and ejects carbon dioxide,.and when they breath air out of it ,it appears like a foutation of water..

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