3) Which of the following parts of a plant cell does photosynthesis depend upon? A: Mitochondria
B: Chloroplasts
C: Vacuoles
D: Cell wall

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

Diagram of the evolution of land plants?

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms