Why is maintenance of a constant blood pH critical for body processes? A. enzymes work best within a narrow pH range.

B. Some bacteria thrive in very acidic conditions.

C. Blood with a high pH helps prevent cancer.

D. The production of vitamin C by skin cells requires low pH values.

In which direction is the pacific plate moving in relation to the north american plate?

How will you manage your time to accomplish the necessary tasks both on the job and at home?

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.