Lack of sleep impairs brain function and, in prolonged cases, can cause dementia or death. a. True
b. False

false

Explanation:

lack of sleep and being in a prolonged class will not cause dementia or death

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation:

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).