Sperm undergo capacitation
A) in the testicles as sperm develop.
B) in the woman's body.
C) just after the second polar body is ejected.
D) immediately following a sperm's penetration of an oocyte.
B) in the woman's body.
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A mutualism in each species can live without the other is termed a
A. facultative mutualism. B. obligate mutualism. C. definite partnership. D. dispersive mutualism. E. defensive mutualism.
Which of the following components is never found in a virus particle?
a. protein b. DNA c. RNA d. ribosomes
Is the grey pigment controlled by the same gene as the red pigment?
a. Yes b. No
Which of the following is true of spirochaetes?
A. They have peritrichous arrangement of flagella B. They are gram-positive C. They are able to penetrate a host's tissues D. They are all sexually transmitted