This image represents: A. the loss of energy that occurs between trophic levels in an environment.
B. how larger producers create larger amounts of energy.
C. the interactions between oxygen and nitrogen in a habitat.
D. None of these choices are correct.

Before the can be observed by using a transmission electron microscope, cells are sliced into very thin sections. what disadvantage does this procedure present in the study of cellular parts

When plants use sunlight to make food, the energy of sunlight is

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.