The source of glucocorticoids is the
a. pituitary gland.
b. adrenal cortex.
c. adrenal medulla.
d. thymus gland.
e. thyroid gland.
B
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The limiting factor of any compound light microscope (i.e., the thing that limits its resolution to 0.2 ?m) is the:
A) number of condenser lenses it has. B) number of magnifying lenses it has. C) number of ocular lenses it has. D) wavelength of visible light.
Crossing over
a. increases variability in gametes. b. happens only once per homologue pair. c. occurs between sister chromatids. d. prevents genetic recombination. e. is followed immediately by separation of each of the chromatids.
Helminth adulthood and mating occur in the
A) intermediate host. B) transport host. C) definitive host. D) tertiary host.
In stratified epithelium, such as the epidermis of the skin, cell division occurs
A) in the cells at the base layer only. B) in the surface cell layer only. C) throughout all the layers. D) in the basement membrane only.