Sebum contains ________ which contributes to creating an inhospitable environment on the surface of the body
A) lysozyme
B) collagens
C) acids
D) salts
E) bile
C
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Bioluminescence, as seen in squids, is possible because:
A. specialized cellular organelles of squids carry out a chemical reaction that results in light production. B. symbiotic bacteria housed in specialized organs of the squid are capable of generating light. C. squids produce a fluorescent product during cellular respiration. D. squids produce a mucous layer that reflects light energy.
Tree rings occur when _____
a. there are droughts during the time the rings form b. environmental conditions influence xylem cell size c. heartwood alternates with sapwood
Which of the following cells is NOT haploid?
a. secondary spermatocyte b. sperm c. primary oocyte d. spermatids e. polar bodies
A product of the anterior pituitary gland that causes color changes in its target cells is _____
A) follicle-stimulating hormone (FSH) B) luteinizing hormone (LH) C) thyroid-stimulating hormone (TSH) D) melanocyte-stimulating hormone (MSH)