In living organisms, chemical reactions responsible for growth, repair, and nutrition are collectively referred to as:
a. development
b. metabolism
c. adaptation
d. genetics
e. homeostasis
b
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E. coli can produce a toxin similar to S. dysenteriae and can cause hemorrhagic colitis. What other organ does it affect?
a. Heart b. Lungs c. Liver d. Kidney
The infectious form of Chlamydia trachomatis is a(n)
A. reticulate body. B. elementary body. C. primary element. D. core body.
Which is the best example of the results of a
neutral mutation?
a. A new wing color evolves that enables a butterfly to better hide. b. A new wing color evolves that makes a butterfly more noticeable. c. Larger muscles evolve that allow a rabbit to run faster. d. A new wing color evolves that doesn’t affect a butterfly’s ability to hide or make it more noticeable. e. Larger eyes develop that enable a rat to see better at night.
What is the most frequent cause of infertility in males?
A. body weight B. pelvic inflammatory disease C. low sperm count D. tubal ligation E. endometriosis