Which of the following statements best defines an altruistic act?
A. imposes a cost on the performer without benefiting another individual
B. imposes a cost on the performer and another individual
C. benefits another individual at some cost to the performer
D. benefits another, related individual at some cost to the performer
E. benefits the performer and another individual
Answer: C
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During S phase, _____
a. chromosomes condense b. the cell produces proteins in preparation for mitosis c. the cytoplasm begins to divide d. DNA is replicated e. sister chromatids separate from each other
Most species of Gram-positive bacteria are
a. photoautotrophic. b. photoheterotrophic. c. chemoautotrophic. d. chemoheterotrophic. e. photochemoautotrophic.
How many of these species probably have a cell wall that consists partly of an outer membrane of lipopolysaccharide?
A) only one species B) two species C) three species D) four species
In the process of fermentation an organic substrate, such as glucose, is reduced and an intermediate of the pathway, such as pyruvate, is oxidized.
Answer the following statement true (T) or false (F)