Answer:
Light energy or chemical energy
Explanation:
Light energy or chemical energy support the whole pyramid. Without it, plants/producers would die (they wouldn't be able to photosynthesize or chemo synthesize), leaving the first level consumers with no food, thus leaving the second level consumers with no food, and so on.
Hope this helped!
Answer:
Lets say you are running in P.E. If you run for to long you get tired. When you are tired you run out of energy and cant run anymore.
Explanation:
I think the best answer would be A. since the number of prairie dogs decreased from the picture on the left to the picture on the right. Hope this helped :p
Answer:
Changing the pH will affect the charges on the amino acid molecules. Amino acids that attracted each other
that is has a nucleus and also a cell wall