Which type of microscope is used for observing small surface detail?
a. light
b. scanning electron
c. transmission electron
b
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The following regression results are from the first stage regression of Price on income and wholesale costs-which is serving as the instrument for a particular grocery product across different markets: Pricei = 3.2(1.0) + 4.3(0.8)WholesaleCostsi + 5.5(2.7)Incomei, where standard errors are reported in parenthesis. What conclusion can be drawn about the instrumental variable?
A. It's under reporting the effect of income on price. B. With a t-stat over 2.5 (4.3/0.8), the instrument is exogenous. C. It's unbiased. D. With a t-stat over 2.5 (4.3/0.8), the instrument is relevant.
Explain the advantages of using recombinant DNA technology to produce human proteins in transgenic plants,
animals, or cultured cells. What will be an ideal response?
Which sentence describes the principle of independent assortment?
a. Genes on the same chromosome are always inherited together. b. Two alleles for a single trait are randomly sorted to individual gametes; chromosomes are not mentioned. c. Alleles on different homologous chromosomes are not randomly sorted to individual gametes. d. Genes on the same
Rachel Carson's book Silent Spring deals with the
A) destruction of polar habitats caused by global warming. B) environmental effects of pesticides. C) effects of lynx predation on snow hare populations. D) fate of tropical rain forests.