If a daughter cell has 50 chromosomes after mitosis, how many chromosomes were in the parent cell?
A. 25
B. 50
C. 100
D. 150
Ans: B. 50
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The two tenets of natural selection are (select all that apply):
A. sexual reproduction in a population. B. variation in a population. C. competition in a population. D. increasing number of members in a population.
In aerobic respiration, chemiosmotic generation of ATP is driven by:
A. Pi transfer through the plasma membrane. B. a difference in H+ concentration on the two sides of the inner mitochondrial membrane. C. large quantities of ADP. D. osmosis of macromolecules. E. the Na+/K+ pump.
In contrast to sarin, soman:
A) is much less persistent and is odorless. B) is five times as lethal and has a fruity odor. C) is a clear, oily agent that looks like baby oil. D) enters the body exclusively through the skin.
Laboratory fermentation tests often include a pH indicator because many bacteria produce (O2/bases/acids) as they ferment carbohydrates.
Fill in the blank(s) with the appropriate word(s).