Which of the following statements about plant hormones is false?
a. They are organic compounds that act as a highly specific chemical signal.
b. They are effective in extremely small amounts.
c. They elicit many different responses.
d. They may stimulate a response at one concentration and inhibit that same response at a different concentration.
e. They currently can be categorized into seven major classes.
e
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QTL mapping can rely on the relationship between genes for quantitative traits and which of the following?
A. The centromere B. Transposon sites C. Structural genes D. Molecular markers such as RFLPs
Which of the following produces bile?
A. gallbladder B. liver C. stomach D. pancreas E. appendix
The role that humans play in artificial selection is to
A. train organisms to breed more successfully. B. create the genetic variants, which nature then selects. C. determine who lives and who dies. D. choose which organisms E. breed, and which do not. perform artificial insemination.
Which of the following phenomena produces magnification?
A) the wavelength of a radiation source B) the refraction of radiation as it passes through a lens C) the thickness of a microscopic specimen D) the numerical aperture of a lens E) the length of an objective lens