What evidence do we have that DNA exists?

You have isolated a fragment of DNA that totally encodes at least two proteins, 120 and 80 amino acids long. The DNA fragment is 400 base pairs long. (A) Why might you consider this unusual? (B) You sequence th two proteins and find no homology.

What type of bonds and atoms form a water molecule

A small cell has a larger plasma membrane surface area than does a large cell.

When electrons of a chlorophyll molecule are raised to a higher energy level, they? a. cause the plant to appear green. b. form a glucose bond. c. are converted to carotenoids. d. are transferred to an electron carrier.

If excess fertilizer is placed around the root of a tomato plant, the leaves of the plant will shrivel and turn brown. explain this phenomenon in terms of tonicity.

What do the proteins embedded in the cell membrane do?

Compare and contrast selective breeding and natural selection

Recall the name for the total amount of living matter in each trophic level of an ecological pyramid.

Hypothesize some evolutionary advantages of being endothermic. what are some of the costs?

Are proteins, lipids, starch, sugar, calcium (ion), iron (ion), and chlorine (ion) found in blood plasma? If they are explain its function in the body.