In what way does prokaryotic fission resemble eukaryotic mitosis?
a. mechanism of chromosome movement
b. production of genetically identical descendant cells
c. chromosome attachment
d. production of a cytoskeletal framework for separating chromosomes
e. horizontal gene transfers
ANSWER: b
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According to the serial endosymbiosis hypothesis, the ancestors of mitochondria are thought to be
purple bacteria. ____________________ Indicate whether the statement is true or false.
Which of the following is a challenge to the hypothesis that bats, which produce an unusually large number of sperm, increase the probability of conception when females engage in multiple matings? I) Female bats can eject the sperm of certain males
after mating. II) A female can actively choose which male mates with her last, thus increasing the odds of conception with that male's sperm. A) Only I is correct. B) Only II is correct. C) Both I and II are correct.
Bees may pick up pollen of one species on a certain place on their bodies; if this area does not come into contact with the receptive structures of the flowers of another plant species, the pollen is not transferred. This is an example of
A. ecological isolation. B. temporal isolation. C. geographical isolation. D. mechanical isolation.
Most bacteria have a natural ability to take up DNA from their environment
Indicate whether the statement is true or false