The cell in this illustration is in __________
a. prophase I.
b. metaphase I.
c. anaphase I.
d. prophase II.
e. anaphase II.
Answer: b
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The maximum number of bonds that can be formed by an atom:
A. is dependent on the valence of that atom. B. is dependent on the number of unpaired electrons in its outer shell. C. can be made up of a combination of single and double bonds. D. is atom specific; for example, carbon can form four bonds, whereas oxygen forms two. E. All of these choices are correct.
One reason that atrazine, an herbicide in use for more than 40 years, is an environmental problem is that it ____
a. raises the level of air pollution b. poses a substantial contribution to greenhouse gases c. disrupts the stratospheric ozone level d. is responsible for the extinction of bee colonies e. is an endocrine disrupter and can reduce reproductive capacity in aquatic animals
Organismal body heat is a:
a. byproduct of endergonic reactions. b. product of glucose synthesis. c. byproduct of exergonic reactions. d. product of anabolism. e. product of ATP synthesis.
A membrane-bound electron carrier found in the electron transport systems of both aerobic respiration and photosynthesis
(A) Cytochrome (B) FADH2 (C) NAD+ (D) NADP+ (E) Oxygen (O2)