Which of the following best describes gene regulation?

a. a person's phenotype can differ from his or her genotype.
b. all cells make all types of proteins at all times.
c. specific proteins are made only at certain times in certain cells.
d. each cell contains the code to make only one protein.

Which describes radioactive decay of a substance

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

Use this dichotomous key for insect identification to identify the insect shown. 1. a. insect has one pair of wings. order diptera b. insect has two pairs of wings. go to #2 2. a. front wings thicker in texture than hind wings go to #3. b. front and hind wings are same texture throughout. go to #4 3. a. front wings are short order dermaptera b. front wings cover entire abdomen order coleoptera 4. a. wings with scale on all parts of their area. order lepidoptera b. wings without scales go to #5. 5. a. hind wings smaller than front wings. order ephemeroptera b. front and hind wings nearly equal in size. order odonata the insect pictured is in the order diptera. ephemeroptera. coleoptera. odonata.