If all other factors affecting photosynthetic rates were equal and atmospheric CO2 concentrations were the main factor affecting photosynthetic rates, how would plant growth in an area that is about 30 degrees C in the daytime have changed over the course of the past 400,000 years?

Which of the following statements about c4 carbon fixation is not true? a c4 carbon fixation is an adaptation for plants exposed to high light intensityb. c4 carbon fixation occurs in more plants than c3 carbon fixation.c c4 carbon fixation is more common in areas of high temperatures than c3 carbon fixation.d. c4 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.

The body of water found at number 4 on the map above is the

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins