Organisms that have two identical alleles for a particular trait are said to be

a. hybrid.

b. homozygous.

c. heterozygous.

d. dominant.

Three things the nervous system does

A 5' cap is not added to ribosomal RNAs or transfer RNAs because they Group of answer choices do not contain any guanine. are not transported out of the nucleus. do not bind the small ribosomal subunit. are not methylated. are not spliced.

During which process is water produced? alcohol fermentation acetyl CoA formation electron transport chain citric acid cycle

How do littoral zones differ from riparian zones?

Select all that apply. What are the nutrients needed for good health? carbohydrates sugars minerals lipids vitamins proteins M

The vasa vasorum are incompetent valves in the large veins. are special capillaries that supply nutrients to the walls of arteries and veins. are the blood vessels that supply blood to the vas deferens.

Which of the following terms have anthropologists used to refer to the observable physical characteristics that distinguish the two kinds of human beings, male and female, needed for human biological reproduction? a. Sex b. Gender c.

Which of the following would happen if cells did not have enzymes? A. Cells would not have any chemical reactions taking place B. Cells would have some chemical reactions, but not enough to support life processes C.

DNA is an incredibly long molecule, and can extend the length of a football field. how can DNA molecule fit inside a nucleus

How do flagellates move