The female gametophyte of a flower develops
within a(an)
a. stigma.
b. anther.
c. calyx.
d. corolla.
e. ovule.
E
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Harry Noller's experiments in which he extracted the ribosomal proteins and found that RNA molecules could catalyze
protein synthesis had one major flaw. What was the flaw?
a. the extraction process may have altered the RNA molecules b. protein synthesis may have occurred prior to extraction c. coenzymes, which were not extracted, might have been responsible for the reaction d. the extraction process may have altered the pH of the environment e. undetectable amounts of protein may have remained
Thinking about the wavelength of light compared to its energy, which of these portions of the electromagnetic spectrum has the highest amount of energy?
A. orange light, at 640 nm B. green light, at 510 nm C. ultraviolet light, at 330 nm D. yellow light, at 590 nm E. blue-green light, at 450 nm
Older roots become thick and woody through the buildup of ____
a. periderm b. meristem c. cork cambium d. vascular cambium e. pericycle
Peaceful uses of nuclear power may eventually be limited by:
A) the risk of criminal or terrorist activities, including theft of fissionable material. B) the risk of catastrophic accidents, such as the events in Chernobyl, Ukraine, in 1986. C) the problem of finding a continued source of nuclear fuels. D) the problem of disposing of nuclear wastes.