Which of the following statements are correct? a. The morula stage involves cleavage of the zygote.
b. The gastrula stage involves differentiation of cells.
c. The blastula stage involves rearrangement of the cells to form a hollow sphere
d. All of the above.
e. None of the above.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.