Answer:
A food web consists of all the food chains in a single ecosystem.
Explanation:
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At least 75% of the history of the earth
Answer:
Physical adaptations do not develop during an individual animal's life, but over many generations. The shape of a bird's beak, the color of a mammal's fur, the thickness or thinness of the fur, the shape of the nose or ears are all examples of physical adaptations which help different animals survive.
Answer: Tissue
Explanation:
A tissue is an ensemble of <u>similar cells and their extracellular matrix (structure) </u>from the same origin that together carry out a specific function.