The surface area of a cell is important because
A. the surface area limits the amount of molecular exchange that can take place between the cell and its surroundings.
B. a small surface area allows the cell to protect itself from foreign organisms.
C. a large surface area makes the cell more fragile.
D. the surface area determines the genetic capabilities of the cell.
A. the surface area limits the amount of molecular exchange that can take place between the cell and its surroundings.
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An abundance of nitrogen (N) and phosphorus (P) in an aquatic environment leads to __________ levels of dissolved oxygen due to _________
A. high; the oxidation of water B. high; the abundance of anaerobic bacteria C. low; reduction of oxygen D. low; high aerobic respiration
For the calico coloration in cats, which of the
following is NOT true? a. Orange color is on one X chromosome. b. Black color is on one X chromosome. c. White is the result of another gene that blocks all pigment production. d. The color white is found on the Y chromosome. e. It does not occur in males.
__________ are open channels that connect the
cytoplasm of abutting cells and permit rapid transfer of ions and small molecules between them. Fill in the blank(s) with the appropriate word(s).
Cellulose microfibrils give the plant cell wall its tensile strength.
a. true b. false