The core of every virus particle always contains
A. DNA.
B. capsomers.
C. DNA and RNA.
D. enzymes.
E. either DNA or RNA.
Answer: E
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Biologists who study biodiversity describe new species and monitor species of which we are aware. Why is the study of biodiversity important in the Anthropocene?
A. The study of biodiversity is important because it provides information about the number of species that go extinct every 1000 years. B. The study of biodiversity is important because it helps quantify the effects of human actions on changes in the traits of many populations (size, density, distribution). C. The study of biodiversity is important because many politicians are biologists and they can influence government policy. D. The study of biodiversity is important because if we don't count all the species on the planet, then we won't be able to identify more potential sources of food.
Which structure contains the angiosperm egg?
A. style B. endosperm C. anther D. embryo sac E. stigma
In transcription,
a. several RNA molecules are made from the same DNA molecule. b. a promoter sequence is needed. c. DNA produces messenger RNA. d. a specific enzyme called RNA polymerase is required. e. all of these occur.
Identical twin raccoons are raised in different environments and yet behave very differently. This is an example of
A) heterozygous alleles. B) the norm of reaction. C) genetic differentiation. D) acclimation.