Question

insects, in contrast to chordates, have what feature in their nervous system?
a) dorsal nerve cord
b) no brain
c) nerve net
d) ventral nerve cord
question 2 (5 points)
listen
which scenario matches the homeostasis strategy of kleptothermy?
a) people huddling together on new year’s eve in times square
b) alligators basking in the sun on a rock
c) penguins having dark coloring to absorb more radiation from the sun
d) a dog panting at the park on a hot summer day

Explanation:

Question 1

• Chordates have a dorsal nerve cord, while insects (arthropods) have a ventral nerve cord. Option A is a chordate feature. Insects do have a brain (so B is wrong), and a nerve net is a cnidarian feature (so C is wrong).

Question 2

• Kleptothermy is sharing body heat. Huddling people share heat (kleptothermy). Alligators basking (B) is ectothermy (behavioral thermoregulation via external heat). Penguins’ dark coloring (C) is morphological thermoregulation. A dog panting (D) is evaporative cooling (thermoregulation via water loss).

Answer:

D) Ventral nerve cord