How many chromosomes does each cell have?

What is used to keep track of the gamates and possible offsprings combination

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%