Question

question 16 of 20 : select the best answer for the question. 16. insects, in contrast to chordates, have what feature in their nervous system? a. dorsal nerve cord b. ventral nerve cord c. nerve net d. no brain mark for review (will be highlighted on the review page) << previous question next question >>

Explanation:

1. Recall the nervous system features: Chordates (like vertebrates) have a dorsal nerve cord. Insects are arthropods (invertebrates) and have a ventral nerve cord.
2. Analyze options:

• Option A: Dorsal nerve cord is a chordate feature, not insect. Eliminate.
• Option B: Insects (arthropods) have a ventral nerve cord. Correct.
• Option C: Nerve net is a cnidarian (e.g., jellyfish) feature, not insect. Eliminate.
• Option D: Insects do have a brain (ganglia - like structure), so "no brain" is wrong. Eliminate.

Answer:

B. Ventral nerve cord