There are two types of cellular respiration, these are aerobic and anaerobic respiration. Anaerobic respiration can occur in the absence of oxygen, but for aerobic respiration to occur, oxygen must be present. The process of aerobic cellular respiration involves a series of oxidation and reduction reactions and the oxygen molecule serve as an electron donor and acceptor during this process. Thus the stages of cellular respiration can only occur if oxygen is present. <span />
ATP and NADPH which would be B and dont know how to answer question 8
Answer:
answer, I guess, is C.primary succession
Portland, Oregon, is a city right next to northern west coast of the USA. Besides being very close to the sea, it is also laid on a river. The sun that heats up the ocean and the river leads to evaporation, causing water vapour to ascend, because of a few wind currents, this water vapour is taken to Portland's area where it colds down and condensates, raining over Portland.
2 would be A because fertilization is where the sperm cell and egg unite. 3 would be C because in the picture you can see how the division is occuring.
