Regulation Of Gene Expression.
Answer:
To show the flow of energy through ecosystems, food chains are sometimes drawn as energy pyramids. Each step of the pyramid represents a different trophic level, starting with primary producers at the bottom. The width of each step represents the rate of energy flow through each trophic level.
Explanation:
Answer:
b
Explanation:
because the answer is obvious
B. Pine trees, this is the answer that was right after I took the test XD
By pushing on the top of it and the water or substance will get into it
