The condition in which there is only one representative of a particular chromosome in a cell is called ________
Fill in the blank(s) with correct word
monosomy
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_____ are substances that give up hydrogen ions when they dissolve in water, so these substances can lower the pH of a solution and make it acidic (below pH 7)
1.Elements 2.Bases 3.Acids 4.Solvents
Balanced polymorphism is a type of
a. disruptive selection. b. sexual selection. c. directional selection. d. stabilizing selection. e. any of these
What is the best explanation for why the arthropods, such as insects, spiders, and crabs, were the first animals to move onto land?
a. The majority of early arthropods did not have to have a moist environment for their survival. b. They possessed primitive lungs. c. They had stout, fleshy fins that allowed them to crawl on land. d. By chance, they already possessed structures suited to life on land so the transition was easier. e. When they moved to land, they encountered no predators.
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.