Tetrodotoxin binds to sodium channels and blocks the passage of sodium ion based on this information which symptom would most likely occur in an organism exposed to tetrodotoxin? A. Decreased appetite due to the production of hormones that indicate fullness. B. Increased heart rate due to increased nerve impulses to the heart muscles. C. Blindness due to proteins in the eyes denaturing and losing functionality. D. Paralysis due to the lack of action potentials to signal muscle tissue.

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.