Which of the following statements related to the nervous system is correct?
a. the nervous system, comprised of two major components, i. e., the peripheral nervous system (pns) and the central nervous system (cns), has three main functions: sensory input, integration of data, and motor output.
b. the pns is subdivided into sensory (afferent) and motor (efferent) divisions.
c. afferent sensory neurons conduct signals from the pns to the cns. efferent motor neurons conduct signals from the cns to the pns.
d. all of the above.

Maria wanted to grow a fern in her backyard. acting on a suggestion from a friend, she collected brown dots from the underside of a fern's leaves and then potted them. after a few days, maria saw small fern leaves erupting from the pot. which statement explains this phenomenon? a. the fern transitioned from gametophyte generation to sporophyte generation. b. the fern grew as a result of mitosis. c. the fern transitioned from sporophyte generation to gametophyte generation. d. the fern grew to be genetically identical to its parent plant.

Because of its structure the cell membrane is known as a phospholipid ? a. bilayer b. molecule c. fluid d. barrier

Cells tend to have a relatively small and uniform size. why aren’t cells larger?