Students planted three bean seeds. after several days, they observed that the seeds' roots were growing downward into the soil. which type of topism were the roots displaying?

An easy way to calculate the amount of energy available at each level is to what?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.