20 POINTS- Which of the following is common feature of the illustrated reactions showing the linking of monomers to form macromolecules? A) Two identical monomers are joined by a covalent bond.

B) Two different monomers are joined by a covalent bond.

C) Monomers are joined by a covalent bond, and a water molecule is produced

D) Monomers are joined by ionic bonds, and a water molecule is produced.

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.