Na20

How many atoms of each element are in this compound?

A) 2 sodium atoms and 1 oxygen atom

B) 2 sodium atoms and 2 oxygen atoms

C) 1 sodium atoms and 1 oxygen atoms

D 1 sodium atom and 2 oxygen atoms

Which term describes the highest pressure against the walls of the blood vessels?

5. Which of the following is NOT true about a recessive gene trait? A. It is expressed when the genotype is heterozygous. B. It can be masked by a dominant gene trait. C. It is expressed only when a dominant gene isn't present. D.

What is parasitism in biology

Proteins can vary in size from approximately 40 to 34,000 amino acids. a. why is there a lower limit to the size of proteins? b. why is there an upper limit to the size of polypeptides?

Which statement is an example of competition? A. Egrets eat insects that are unearthed after livestock graze. B. Wasps lay eggs inside hornworms so that after hatching the wasp larvae can feed on the hornworm. C.

2. The diagram below shows the general structure of an amino acid. Which type of molecule is formed from amino acids?

If the lion population increases then A. the antelope population must have increased recently. B. the antelope population must be diseased. C. lion carrying capacity will be met. D. the antelope population will decrease. E. Both A and D. F.

Why is it difficult to observe individual chromosomes with a light microscope during interphase? view available hint (s) why is it difficult to observe individual chromosomes with a light microscope during interphase?

Cells contain parts known as organelles. These parts are specialized. What does this mean? A. The parts feel really good about themselves. B. Individual parts perform a wide variety of functions. C. Individual parts perform very specific functions.

Which two systems are most directly involved in providing molecules needed for the synthesis of fats in human cells? A. digestive and circulatory B. excretory and digestive C. immune and muscular D. reproductive and circulatory