The size of a food chain can vary, but the number of levels that a food chain can reach is limited. Why does this limit exist?

Plants are not infinite in number.
Producers are limited by consumers.
Carnivores are too large to be eaten.
Energy is lost at each trophic level.

What is the number of phosphates in an atp molecule

Nh3 +02-no + h20 is unbalanced what is the balanced equation

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above