If valuable solutes were not adequately reabsorbed from filtrate, what would occur?
A) The excretion process could not be completed.
B) The solutes would be excreted.
C) The filtration process could not be completed.
D) The solutes would be reabsorbed.
Answer: B
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At about pH 7 in most cells, what happens to the amino R-group on an amino acid?
A) It acts as a base and gains a proton, giving it a positive charge. B) It acts as an acid and loses a proton, giving it a negative charge. C) It is reduced, and tends to act as an electron donor in redox reactions. D) It remains neutral, like water, and does not have a charge.
The spindle is
A. the network of protein cables that will pull the chromatids to opposite ends of the cell. B. the new cell membrane as it reforms across the cytoplasm during cytokinesis. C. the protein that connects the duplicated chromosomes. D. the protein that DNA winds itself around.
Which phylum of vascular, seed-bearing plants includes pines, spruces, and firs?
a. Gnetophyta b. Cycadophyta c. Ginkgophyta d. Coniferophyta
Lamarck's hypothesis that traits acquired during the lifetime of an individual are passed on to progeny:
a. was interesting, reasonable, and based on an idea that was universally accepted by scientists and nonscientists alike. b. connected evolutionary change to environmental fit. c. Both of the above. d. None of the above.