In the accompanying figure, the purpose of growing the donor cells in nutrient-limited media is to:
a. have small cells that would be easier to manipulate.
b. replicate a normal environment.
c. force the donor cell nucleus into the G0 cell stage.
d. induce favorable mutations.
e. initiate apoptosis.
c
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Which of the following is the causal agent of gastric ulcers?
A) Staphylococcus aureus B) Escherichia coli O157:H7 C) Helicobacter pylori D) Vibrio cholerae
The symbiotic relationship wherein both partners benefit is termed
A. commensalism. B. parasitism. C. independence. D. mutualism.
Based on the literature, you hypothesize that students in traditional biology lectures will have the same grades as students in online biology lectures. You decide to test your hypothesis by comparing grades of students in traditional and online biology lectures over a semester. As a result of the experiment, you observe that the grades in the traditional lectures and the grades in the online
lectures are not significantly different. What do these observations allow you to do? A. develop a scientific theory B. reject the hypothesis C. accept the hypothesis without further question D. reject the null hypotheses
In the history of life development on Earth one must
A. trace events that compose macroevolution. B. examine the fossil record. C. examine biogeographical evidence. D. all of the choices must be considered.