The nitrogenous base that is only found in DNA and not in RNA is:
A. adenine.
B. cytosine.
C. uracil.
D. guanine.
E. thymine.
Answer: E
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Density-independent controls over population growth include:
a. parasites b. temperature c. disease d. competition for food e. competition for shelter
Four of the five answers listed below are
people who were involved in the discovery of the structure of DNA. Select the EXCEPTION.
a. Wilkins b. Wallace c. Watson d. Franklin e. Crick
Despite abundant vegetation, ________ make poor farmland because of little topsoil and scant soil nutrients
Fill in the blank(s) with correct word
Answer the following questions true (T) or false (F)
1. Giardiasis and cryptosporidiosis are both caused by helminth infections. 2. No bacteria have been detected in the semen of healthy men. 3. A urine dipstick test is negative for elevated nitrite, but bacteriological culturing reveals Gram-positive cocci. Uropathogenic Escherichia coli is indicated.