Answer the following questions true (T) or false (F)
1. The Ebola virus is a single-stranded RNA virus.
2. Endocarditis is mainly seen in people who have damaged, abnormal, or artificial heart valves or other heart defects.
3. Rocky Mountain spotted fever continues to be isolated to those states that border the Rocky Mountains.
1. TRUE
2. TRUE
3. FALSE
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Natural selection that shifts the adaptation of an entire populations is
a. stabilizing selection. b. directional selection. c. disruptive selection. d. artificial selection. e. sexual selection.
In Waller's experiment, he placed one front paw and one back paw of a dog into pans containing
a. carbon dioxide. b. iron. c. mercury. d. pure water. e. salt solution.
Approximately _____ of IVF pregnancies result in multiple births
a. 5% b. 10% c. 20% d. 50% e. 75%
From which of the following processes did the first oxygen molecules come from?
a. aerobic respiration b. anaerobic respiration c. the oxidization of water d. the reduction of water