Explain why a once functional structure might become a vestigial stuructre

What normally happens to the levels of lactase produced throughout a person's lifetime?

Differentiate between swallowing and peristalsis

In everyday life, a theory is an educated guess. In science a theory is A: an accepted claim. B:unsubstantiated truth. C: unsubstantiated claim. D:a well-supported explanation.

A young farmer purchases some land in a relatively arid area and is interested in earning a reasonable profit for many years.

When meiosis is complete, what is produced? A. Four haploid cells B. Two haploid cells C. Two diploid cells D. Four diploid cells

Which technique is used to separate the different cell parts?

Where does the mitochondrial DNA originate?

Which structure of a protein is the arrangement of polypeptides? A - primary B - secondary C - tertiary D - quaternary

Describe Three functions of reproduction

What is the primary function of the respiratory system? Question 5 options: 1) Transportation of blood 2) Oxygenate blood 3) Absorption of nutrients 4) None of the above