206. A small portion of the population that is geographically isolated from the rest of the population
runs the risk of decreased.
A. genetic drift
B. mutation rate
C. natural selection
D. genetic variation

the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )

it is either c or d and i know for sure it is not a or b

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.