Amniotes differ from earlier vertebrates by ____.
A. their large size
B. their three-chambered heart
C. producing eggs in which the young can develop away from water
D. the possession of a slimy skin
E. having external scales
Answer: C
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Fossils
(a) are remains of organisms. (b) are formed when organic materials are replaced with minerals. (c) provide evidence of evolution. (d) are all of the above.
Adult stem cells are ______________¬ cells, whereas embryonic stem cells are ______________ cells
A. pluripotent / totipotent B. unipotent / multipotent C. multipotent / pluripotent D. multipotent / totipotent
The oil globules that result when a water and oil
mixture is shaken are due to a(n) __________ interaction. a. acidic b. basic c. hydrophilic d. hydrophobic e. ionic
What would happen if complexes I-IV of the electron transport chain pumped protons in the opposite direction?
A. There would be too many electrons in the mitochondrial matrix. B. Too much ATP would be synthesized. C. None of the other answer options is correct. D. No ATP would be synthesized.