In gel electrophoresis, DNA molecules move toward the ________ electrode because they have an overall ________ charge
A) negative; negative
B) positive; positive
C) negative; positive
D) positive; negative
E) negative and positive; neutral
D
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Chimpanzees and gorillas share the trait of knuckle-walking, which humans do not generally have. Why do most scientists NOT classify chimpanzees and gorillas as each other's closest relatives?
A) The majority of genetic evidence places chimpanzees closest to humans, not to gorillas. B) Fossil evidence suggests that knuckle-walking was present in ape ancestors and is not a uniquely derived trait for chimpanzees and gorillas. C) Chimpanzees and humans share more unique features in common than either share with gorillas. D) Fossil apes that are thought to be closest to humans show adaptations for knuckle-walking, implying that humans have secondarily lost the trait. E) All of the above.
The amount of energy needed by the body to perform essential functions such as breathing is the ________
Fill in the blank(s) with correct word
Select all of the ways you could have acquired nitrogen that is now in your proteins, DNA, and RNA:
What will be an ideal response?
When tumor suppressor genes mutate, their products
What will be an ideal response?