How did primitive heterotrophs produce energy? A. Aerobic respiration
B. chemical fermentation
C. photosynthesis

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?

Describe the relationship between isotonic solutions, equilibrium, and water movement into and out of a cell.

What happens when a plant is losing too much water through transpiration? question 14 options: stomata open stomata close guard cells swell respiration increases