Which animal has the simplest known central nervous system?

a. a flatworm
b. an arthropod
c. a chordate
d. a mollusk
e. an echinoderm


ANSWER: a

Biology & Microbiology

You might also like to view...

Which of the following is the best description of algae?

A. a heterotrophic protist B. a chemotrophic protist C. a heterotrophic prokaryote D. a chemotrophic prokaryote E. a photosynthetic protist

Biology & Microbiology

Action potential propagation is the fastest in ____

a. a myelinated axon with a small diameter b. an unmyelinated axon with a small diameter c. a myelinated axon with a large diameter d. an unmyelinated axon with a large diameter e. all myelinated axons regardless of diameter

Biology & Microbiology

You are planning to set sail on your catamaran from Los Angeles to Tahiti. What piece of navigating equipment would you wish to use?

a. sextant. b. GPS unit. c. chronometer. d. physiographic chart.

Biology & Microbiology

Which of the following animals is phototrophic?

A. Jellyfish B. Butterflies C. Dolphins D. Monkeys E. None of the above are phototrophic

Biology & Microbiology