It could be related with animals that havent gone extinct yet
The answer is
Blood picks up carbon dioxide from the cells of the oxygen
Explanation:
Mendel crossed purebred plants with opposite forms of a trait. He called these plants the parental generation , or P generation. For instance, purebred tall plants were crossed with purebred short plants. Mendel observed that all of the offspring grew to be tall plants.
If sugar concentration within a cell is high/rises, then water will enter the cell increasing the volume of cytoplasm within the cell and hence the volume/size of the cell itself;
Alternatively, if the sugar concentration within a cell is low/falls, then water leave the cell decreasing the volume of cytoplasm withing the cell and thus the cell will get smaller.