What structure is present within a follicle?
A. vaginal cleft
B. labia
C. mucus-secreting glands
D. oocyte
E. clitoris
Answer: D
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If two populations are geographically restricted groups of the same species, but display one or more traits that are somewhat different, the two groups are sometimes classified as
A. subspecies B. phenotypes C. macrospecies D. genetic clones
Which of the following antibiotics are produced by members of the genus Bacillus?
A. Gramicidin B. Bacitracin C. Polymyxin D. All of the choices are correct.
An antigen is
A) a molecule that can elicit an immune response. B) a nucleic acid only. C) a protein or nucleic acid. D) a protective protein that the immune system produces.
The entrance into the cavity formed during gastrulation in sea stars and frogs is called the
a. archenteron. b. blastocoel. c. blastocyst. d. blastopore.