Why do we need both aerobic and anaerobic respiration?

Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore? a) a different type of sporopollenin b) an internal reservoir of liquid water c) integument(s) d) ability to be dispersed e) waxy cuticle

What is the relationship between absorbance of light and the rate of photosynthesis?

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry