Introducing a double bond into a fatty acid has the effect of putting a(n) _______ into the conformation of the molecule.
a. amino acid bulge
b. kink
c. reverse spiral
d. reinforcing rod
Ans: b. kink
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The replacement model of human evolution asserts that ________
a. Homo sapiens evolved directly from Homo floresiensis b. Homo sapiens arose from a single Homo erectus population in Africa c. races of modern humans had their beginnings in Homo erectus d. populations of Homo erectus in Africa evolved into Homo sapiens gradually
On a biology field trip near campus you observe layers of volcanic rock, eroded mountain rocks, and even rocks apparently formed near an ocean coast. You notice that fossils found within the different rock layers have diverse body forms as a result of their environment. This set of observations tends to support
A. limits to the fossil organism populations, as proposed by Malthus. B. catastrophism, as proposed by Cuvier. C. uniformitarianism, as proposed by Hutton. D. uniformitarianism, as proposed by Lyell. E. microevolution of the organisms, as the environment changed.
The concentration of carbon dioxide in the
atmosphere is four molecules for each __________ molecules of air. a. 100 b. 1,000 c. 10,000 d. 100,000 e. 1,000,000
Parasites are generally smaller than their host
Indicate whether the statement is true or false