The ____ gland(s) secrete(s) thyroid stimulating hormone (TRH)
a. thyroid
b. parathyroid
c. thymus
d. hypothalamus
e. anterior pituitary
ANSWER: d
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Microfilaments such as actin, microtubules, and the intermediate filaments form the cell-supporting structure called the:
A. cytoplasm. B. nucleus. C. plasma membrane. D. cytoskeleton.
Which pigments reflect red, orange, and yellow light?
a. chlorophyll a b. phycocyanobilin c. phycoviolobilin d. carotenoids e. anthocyanin
Most Gram-positive bacterial cells exhibit which of the following characteristics?
A) Thick layer of peptidoglycan without teichoic acids and large periplasmic space B) Thick layer of peptidoglycan with teichoic acids and small periplasmic space C) Thin layer of peptidoglycan without teichoic acids and large periplasmic space D) Thin layer of peptidoglycan with techoic acids and a small periplasmic space
Which of the following radiation uses is the one that is most likely to have beneficial and harmful consequences?
A) Using radiation to treat a cancer patient. B) Using radiation to sterilize mail. C) Using radiation to sterilize surgical equipment prior to a surgery. D) Radiating fruits and vegetables prior to storage. E) All of these will have beneficial and harmful consequences.