____ may have been a source of organic monomers on early Earth
a. Venus
b. Meteorites
c. Volcanoes
d. Stromatolites
e. Comets
ANSWER: b
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Indicate whether the statement is true or false
Which of the following is (are) true of natural selection?
A) It requires genetic variation. B) It results in descent with modification. C) It involves differential reproductive success. D) It requires genetic variation, results in descent with modification, and involves differential reproductive success.
In humans, structures that show developmental homology with other chordates are
A. the lungs and vertebrae. B. the eyes and nostrils. C. gill ridges and a bony tail. D. fore and hindlimbs.
Differences between mitochondrial and E. coli electron transport chains include which of the following?
A. The fundamental principles on which they operate are different. B. The E. coli chain contains a different array of cytochromes. C. Higher P/O values are observed in E. coli. D. The electron transport chain does not involve membranes in E. coli.