In natural communities, some feedback mechanisms operate whenever populations change in size;
they are
a. density-dependent factors.
b. density-independent factors.
c. always within the individuals of the community.
d. always outside the individuals of the community.
e. the same as genetic drift.
A
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Which four of the following entities are generally included in the field of microbiology?
a. bacteria b. insects c. archaea d. viroids e. slime molds f. mosses
The processes that plants use to move water, sugar, and other solutes through their bodies involves
primarily
a. cohesion and evaporation. b. evaporation and pumps. c. capillary action and pumps. d. positive pressure from roots and cohesion. e. capillary action and positive pressure from roots.
What is the most abundant animal in soft-bottomed communities?
a. Whelks b. Brittle stars c. Polychaetes d. Mussels
Cells that generally lack a membrane-bound nucleus and organelles; the cell type within the domains Bacteria and Archaea.
What will be an ideal response?