The rate of background extinction is
A. 0.1 to 1.0 species per year per million species.
B. 0.001 to 0.01 species per year per million species.
C. 1.0 to 10 species per year per million species.
D. 10 to 100 species per year per million species.
E. None of the answers are correct.
A. 0.1 to 1.0 species per year per million species.
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Which bird is a social parasite and lays its eggs
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The early amniotes
a. developed a land egg. b. had a four-chambered heart. c. had lungs equipped with air sacs. d. were bipedal and gave rise to the mammals. e. appeared at the start of the Paleozoic Era.
Which of the following is an indirect method for estimating the number of microbes in a sample?
A. viable plate counts B. turbidity C. Coulter counter D. MPN E. membrane filtration
The figure below shows the results of a selection experiment in the laboratory in which two Drosophila repli-cate lines were selected for longer life span. Which of the following is the most accurate conclusion that you can draw from this data?
a. There is a genetic basis for longevity in Drosophila. b. There is heritable variation for longevity in a Drosophila population. c. Senescence is heritable in Drosophila. d. The slope of a fitted line through the data points would provide an estimate of the heritability of longevity.