What is the maximum value for an altitude in reference to the horizon
A. 0 degrees
B. 180 degrees
C. 90 degrees
D. 24hrs

Despite the differences in mature plant cells, all of them are derived from meristem cells. the three major types of tissue systems develop from the meristem. meristems develop cells in all but which tissue?

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.

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?