The excretions of living organisms are best categorized as which type of factor in an environment ? a. biotic b. abiotic c. living d. nonliving

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Which prefix mean under less or below

Where is the nictitating membrane found? a. between the eyelid and the eyeball b. between the retina and the optic nerve c. between the outer and middle ear d. in the organ of corti in the middle ear