F Dr. Fletcher is interested in a causal relationship between joining a fraternity/sorority and attractiveness/appearance concern, why doesn’t he conduct a true experiment?

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

The production of cells during mitosis into specialized function is recombination or differentiation

What are the formed elements (cell or parts of cell) in blood and what are their functions ?