If a DNA sample contains 13% adenine, what percentage of the sample contains cytosine?
A. 37%
B. 13%
C. 74%
D. 26%
Answer: A
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The stage of Lyme disease that is characterized by arthritis is the
A. primary. B. third. C. second. D. fourth.
On the Hawaiian Islands, speciation in Drosophila occurred when a small group of males and females colonized a new
island, where they faced environmental selection pressures. In addition, sexual dimorphism – and therefore, sexual selection – maintained reproductive isolation from other populations on the new island. These populations, although closely related, remained ecologically different. These events are examples of ____.
a. a founder effect only b. genetic drift only c. adaptive radiation only d. a founder effect and genetic drift, but not adaptive radiation e. a founder effect, genetic drift, and adaptive radiation
The brain center for homeostatic control of the internal environment is the ________
a. hypothalamus b. cerebellum c. pons d. thalamus
In humans, fungi are most likely to infect ____
a. Skin b. Blood c. Bone d. Muscle e. connective tissue