Answer:
respiration, waste production, food intake, cells, breathing
Plicae, villi and microvilli increase the surface area for he absorption of nutrients
During sleep the brain consolidates information into the long term memory.
Males tend to determine the sex of the baby depending on whether sperm is carrying and X or Y chromosome. An X chromosome combines with a mothers X chromosome to make XX (Girl). A Y chromosome from a male will combine with a mothers X chromosome to make an XY (Boy).
Males always pass on the Y chromosome
