The direct source of energy for the production of oxygen by phytoplankton is A. sunlight
B. heat
C. shrimp
D. water

Which part of cellular respiration must occur before any of the other steps can occur

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.