Exposure to ultraviolet light causes the skin to darken by stimulating the
A. breakdown of melanin.
B. activity of the keratinocytes.
C. breakdown of carotene.
D. buildup of bilirubin.
E. activity of the enzyme tyrosinase.
Answer: E
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Which of the abdominal muscles has its fibers running in an inferomedial direction?
A. Rectus abdominis B. Transversus abdominis C. Internal oblique D. External oblique E. None of these choices is correct.
You are a researcher specializing in cytology, specifically the cell structures of the skeletal muscle that moves the body. The instrument that you would use to see the fine detail within cells would be the
A) MRI scan. B) light microscope. C) scanning electron microscope. D) transmission electron microscope. E) CT scan
The ________________________ system includes feathers and hooves
Fill in the blank(s) with correct word
Cell division in which the two daughter cells receive the same number of chromosomes as the parent cell is called _____
Fill in the blank(s) with the appropriate word(s).