Natural selection is a process in which environmental pressures result in the differential ________ and ________ of individuals in a population
a. survival, physical features
b. genetics, mutations
c. survival, reproduction
d. reproduction, mutations
e. genes, mutations
c
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Which of the following are examples of adaptations that do not result from living at high altitudes?
a. elevated erythrocyte count b. increased number of alveoli c. increased number of lung capillaries d. hemoglobin molecules with greater affinity for O2 e. decreased erythrocyte count
Which of the following is NOT an example of
sensory adaptation? a. a loss of the sense of pressure of clothes against the skin b. adjustment to repeated jumping into a body of cold water c. response to lack of oxygen at high altitudes d. eventual loss of awareness of a constant noise e. the loss of the ability to smell a person’s perfume after being in that person’s presence for some time
An isolate of a mutant bacterium appears to grow more slowly than the wild-type population from which it was isolated
Further studies showed that the slower growth was due to a markedly reduced DNA polymerase I activity. From this information, one would expect that this organism would also be deficient in the activity of DNA A) excision repair. B) recombination. C) transcription. D) translation. E) unwinding.
The "X" shaped chromosomal hereditary material can be packaged in this organelle in eukaryotic cells but not in prokaryotic cells. This organelle is the:
A. nucleoid. B. chloroplast. C. ribosomes. D. nucleus. E. mitochondria.