What role does wind play in desertification?
a. Wind disperses seeds.
b. Wind blows away topsoil.
c. Wind impedes grass growth.
d. Wind damages mature grasses of grasslands.
e. Wind causes drought.
b
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Mixed type inhibitors will affect the ________ of an enzymatic reaction.
A) Km B) Vmax C) S D) P E) both choices A and B
Comparing transmission electron microscopy with scanning electron microscopy, the following statement is true.
A. Transmission EM can provide good images of bacteria but not viruses. B. Transmission EM is used for internal detail of cells and subcellular structures. C. Transmission EM requires dyes. D. Transmission EM gives detail of the external architecture of cells.
What factor is contributing to the decline in fish populations?
A) destruction of Girard Boro Parks wetland B) elevated pollution levels in elk creek C) dams being built D) all of the above
Recognition proteins are most important for
A) distinguishing foreign cells from "self" cells. B) active transport of molecules. C) maintaining membrane fluidity. D) maintaining membrane integrity. E) facilitated diffusion of molecules.