Which of the following variables might be a proxy variable for the confounding factor of cognitive ability in a sample of workers and their ability to generate sales?
A. Age
B. Tenure at the company
C. Test scores
D. Past sales records
Answer: C
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Egg laying is a character unique to which groups of animals and their ancestors?
A. birds B. mammals C. reptiles D. All of the answer options are correct.
Clues from geology and paleontology suggest that simple cells, or their precursors, arose about _____ years ago.
A. 6 million B. 4 billion C. 2 billion D. 1 million E. 3 million
The microtubules that form the mitotic spindle extend out from the centrosome. Where would you expect to find the plus (fast assembling) end of a spindle microtubule?
a. at the centrosome b. at the kinetochore c. away from the centrosome, at the kinetochore d. away from the centrosome
Suppose your mother has albinism, which is a recessive trait. Suppose also that your father has cystic fibrosis, which is also caused by a recessive trait. And, you learn that your father-in-law has albinism and cystic fibrosis. What are the odds that your first child will have both albinism and cystic fibrosis?
a. 1 in 2 b. 1 in 4 c. 1 in 8 d. 1 in 16