DNA contains all of the following nitrogencontaining
bases EXCEPT
a. adenine.
b. uracil.
c. guanine.
d. adenine.
e. thymine.
Answer: b
Biology & Microbiology
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A. mouth. B. stomach. C. rectum. D. small intestine. E. anus.
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Which of the following is(are) associated with balance?
a. semicircular canals b. cochlea c. incus, malleus, and stapes d. eardrum and ear canal
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In addition to the circulatory system, the ________ system is also characterized by possessing a series of fluid-filled vessels
Fill in the blank(s) with correct word
Biology & Microbiology
Animals are thought to have descended from choanoflagellate protists. Which poriferan cell type lends evidence to this claim?
A. Amoebocyte B. Gamete C. Choanocyte D. Spicule
Biology & Microbiology