Tertiary and quaternary structure of proteins involves ________ bonds.
A. hydrogen
B. ionic
C. polar covalent
D. nonpolar covalent
E. ionic, hydrogen, polar, and nonpolar covalent
Answer: E
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The smallest certifiable living organism is a
A. bacterium called Mycoplasma. B. virus. C. nanobe. D. protozoan called Giardia. E. All of the answer choices are correct.
Scientists have found that bluegill sunfish receive the highest energy return from large Daphnia, an intermediate return from medium Daphnia and the smallest return from small Daphnia. If you were to stock aquaria with equal proportions of small, medium, and large Daphnia, but vary the density of Daphnia from very low to very high, how do you think bluegills would react?
A. Bluegills would consume a larger proportion of small Daphnia in the very low density aquaria compared with the medium or high density aquaria. B. Bluegills would consume equal proportions of large Daphnia in all aquaria. C. The tendency to select large Daphnia over small or medium Daphnia will increase as the density of Daphnia in the aquaria increases. D. In medium density aquaria, bluegills would select medium sized Daphnia over small or large Daphnia.
An organism with an incompletely lined body cavity around the gut is termed a(n) ________ animal
a. coelomate b. acoelomate c. pseudocoelomate d. protostome
The surest way to diagnose cancer is through ____
a. DNA probes b. biopsies c. x-rays d. MRI imaging
e. radioactive monoclonal antibodies