The entire complement of RNA produced under a given set of conditions is called a(n)
A) array.
B) genome.
C) proteome.
D) transcriptome.
Answer: D
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The organelles of movement are called:
a. nuclei. b. chloroplasts. c. flagella and cilia. d. mitochondria. e. cytosol.
Mutation is a source of new genetic variation. New genes can only be introduced into the population when individuals reproduce. Considering this, would you expect more variation in a population of mice or elephants, over the same time period, assuming that the populations were the same size? Explain
What will be an ideal response?
The chorion develops from the
a. trophoblast. b. blastocyst. c. blastomere. d. gastrula. e. morula.
In 1986, a nuclear power accident in Chernobyl, USSR (now Ukraine), led to high radiation levels for miles surrounding the plant
The high levels of radiation caused elevated mutation rates in the surviving organisms, and evolutionary biologists have been studying rodent populations in the Chernobyl area ever since. Based on your understanding of evolutionary mechanisms, which of the following most likely occurred in the rodent populations following the accident? A) Mutations caused major changes in rodent physiology over time. B) Mutation led to increased genetic variation. C) Mutation caused genetic drift and decreased fitness. D) Mutation caused the fixation of new alleles.