Give reasons for the following:a) arteries are thick walled.
b) Blood goes only once in one cycle through the heart in fishes
c) plants have low energy needs
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Answer:
a)blood flows faster in arteries than in veins.so arteries have .........
c) because they do not move and plants contain many dead cells which need less energy compared to animals
b)because they r 2 chambered heart
Explanation:
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