All of the following reasons—except one—explain why so many sperm are ejaculated when only one
is needed for fertilization. Which is the incorrect reason?
a. Many sperm die by phagocytosis in the female tract.
b. Many sperm swim up the wrong oviduct.
c. The enzymes from many acrosomes are needed to penetrate the corona radiata.
d. Many male pronuclei must be present in order to fuse with each female pronucleus.
e. Many sperm die as a result of the unfavorable pH in the vagina.
D
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What are the DNA "bonding rules" that allow DNA to maintain its specific structure?
a. A only bonds to T. b. C only bonds to G. c. A only bonds to U. d. Both a and b above.
What term refers to the renewal of a natural
ecosystem that has been degraded?
a. ecological balance b. ecological restoration c. eutrophication d. biological magnification e. bioremediation
Peptide bonds
A. are used to form amino acids B. form between fatty acids C. are formed by a hydrolysis reaction D. link amino acids
All of the following are common to both the Gram stain and the acid-fast stain EXCEPT
A. primary stain. B. counterstain. C. a decolorizing agent. D. a chemical mordant. E. a decolorizing agent and a counterstain.