Which pigment participates directly in the light reactions by absorbing mainly blue-violet and red light?
A. chlorophyll a
B. carotene
C. chlorophyll b
D. lycopene
A. chlorophyll a
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Sperm is indicated by
a. A. b. B. c. C. d. D. e. E.
Which vitamin is found in leafy green vegetables and is necessary for proper blood clotting?
a. vitamin D b. vitamin E c. vitamin K d. vitamin A e. thiamin
Cross-mating may occur between two different species but the resulting offspring survive poorly and are sterile. Why is this particularly important to endangered species that cross-mate?
a. This can lead to extinction of particular species. b. The resulting hybrids are the basis for a new species. c. Hybrids increase the reproductive capacity of the endangered species. d. This will lead to genetic divergence in the population. e. This can lead to an increase in numbers of the endangered species.
Suppose you've run a regression relating Revenues to TV Ads and Online Ads. You are willing to make the necessary assumptions to deduce causality and run hypothesis tests. Your results are as follows: CoefficientsStandard Errort-StatP-valueIntercept5988.0431072202.1367652.7191967380.006881952TV Ads199.632021227.826586737.1741469124.63154E-12Online Ads53.5209242941.08181151.3027888090.193533758If you tested the null hypothesis that Online Ads have no impact on Revenues at the 90% confidence level (i.e., 90% degree of support), you would:
A. Fail to reject, and conclude Online Ads do impact Revenues B. Fail to reject, and conclude there is insufficient evidence to establish that Online Ads impact Revenues C. Reject, and conclude Online Ads do impact Revenues D. None of the answers is correct