What do scientist think causes the movement of earth's plate?

4) repetitive change

Why are plant leaves specialized structures that are generally flat and thin?   answer: to maximize the amount of light transmission through the cell layers.

4. a b and cprocess included are: 1. reproduction, is as vital for an entire race to survive. it prolongs their generation onwards and offspring to the next centuries to pass by. 2. obtaining energy. in both humans and animals, even plants is a challenge because these creatures need to work in order to obtain these need resource from food –preys. 3. maintaining structure. for the living organisms to still exist they need to keep themselves intact. combating diseases and having nutrition. this is a by-product of having energy. 4. irritability. responding to stimulus5. excretion. able to dispose waste6. movement. being able to be in one place to another.7. growth. able to develop.8. death.