What best explains the variation in tree heights in the tropical rain forest?
grazing patterns of herbivores

competition for light and moisture

fewer nutrients are available to the shorter
trees

O
the intense heat causes the trees to be
shorter than similar trees in other biomes
CLEARAN

Apatient is in need of hydration. which type of solution are the patient's cells most likely in?

Which blood cell spend most of their time in the lymphatic system?

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.