Ques:If mammals breathe by relaxing the lungs, then what breathes by relaxing the lungs? Answer choices: - mammals - tortoises - dogs - chickens - ducks - humans - crocodiles - animals

Ans:mammals
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Ques:If arthropods may live in large colonies and have complex social behaviors, then what kind of animal can live in large colonies and have complex behaviors? Answer choices: - arthropods - warm-blooded - birds - mammals - animals - honeybees - fur seals - fish

Ans:arthropods
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Ques:If monotremes lay eggs, then what is the distinguishing feature of monotremes? Answer choices: - They lay eggs - the eyes - Veins and arteries. - eardrum - four limbs - layers of fat - They have thick fur - fur and fat

Ans:They lay eggs
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Ques:If pollutants have a negative impact on human health, then pollutants can harm? Answer choices: - air - lungs - people - health - humans - the skin - animals - cells

Ans:
health
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