Explain how the absorption of water by roots photosynthesis take place. long answer .

photosynthesis is the process by which plants use sunlight to manufacture their food from carbon dioxide and water.

so the water the plants roots absorb from the soil is a necessity for photosynthesis

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.