Suppose you have two departments and have daily data on complaints and number of products they oversee for the departments over two years. In the second year, you increased the number of products under the scope of department #2 by 10. To estimate the effect of this increase in the number of products, you estimate the following regression: Complaintsit = ? + ?1 × Department #2it + ?2 × Year2it + ?3 × Department #2it × Year2it + Uit. Which coefficient controls for non-time varying effects that make department #1 have more complaints than department #2?
A. ?3
B. ?1
C. ?2
D. ? + ?3
Answer: B
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The hypothesis that closely matches the data provided is:
A. spiders are the top predators on all islands. B. herbivorous insects survive best on islands where spiders and centipedes live. C. herbivorous insects and spider populations are decreased by centipedes. D. herbivorous insects feed on spiders and centipedes.
While all are found which type of life cycle is most common among protists?
1.Haploid-dominant cycle; the zygote is the only diploid cell.
2.Diploid dominant cycle; gametes are the only haploid cells.
3.Alternation of generations; multicelled haploid and diploid stages.
A protein that has been transported past the outer chloroplast membrane would have to pass how many more membranes to reach the stroma and thylakoid lumen, respectively?
A. 3,4 B. 1,2 C. 2,3 D. 0,1
Predict the outcome of an F+ to F? mating if the F+ cell lacked a functional tra operon.
A. There would be no effect on conjugation. B. Conjugation would occur, but the F- recipient could not become Hfr. C. Conjugation would not occur because there would be no contact between the F+ and F? cells. D. Upon entering the recipient, the F factor would be unable to integrate into to host chromosome.