Which portion of the testes produces sperm?
a. Leydig cells
b. interstitial cells
c. epididymis
d. seminiferous tubules
e. Sertoli cells
ANSWER: d
You might also like to view...
Which of the following structural features of plants would not be expected to reduce transpiration?
A) thick cuticle on leaves and stems B) abundant epidermal hairs on leaves and stems C) sunken stomata D) stomata on upper and lower surfaces of the leaves E) reduced leaf size
A time-specific life table is constructed by sampling the
A) fate of a group of individuals born at a given time from birth to death. B) fate of a group of individuals born over several time periods from birth to death. C) population to obtain a distribution of age classes during a single time period. D) population to obtain a distribution of age classes during multiple time periods.
An isolate of a mutant bacterium appears to grow more slowly than the wild-type population from which it was isolated
Further studies showed that the slower growth was due to a markedly reduced DNA polymerase I activity. From this information, one would expect that this organism would also be deficient in the activity of DNA A) excision repair. B) recombination. C) transcription. D) translation. E) unwinding.
If the two alleles for a particular gene are different the gene pair is
a) homologous. b) heterozygous. c) homozygous. d) dominant. e) recessive.