The results of the butterfly experiment
a. supported the hypothesis.
b. provided valuable quantitative data.
c. confirmed the prediction.
d. provided evidence of natural selection in action.
e. all of these.
Answer: e
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Which of the following is NOT a trait of rickettsias?
A) They are obligate intracellular parasites. B) They lack cell walls. C) They have not been cultivated in the absence of host cells. D) Both the host and parasite are required in order to be alive and metabolically active.
Unattached earlobes are a dominant trait in humans. Which phenotype does an individual with the genotype EE show?
A. Both earlobes are unattached. B. Both earlobes are attached. C. The right earlobe is unattached and the left earlobe is attached. D. The right earlobe is attached and the left earlobe is unattached. E. Both earlobes are extremely elongated.
The techniques used to study molecular evolution are based on the comparison of nucleotide and amino acid sequences among species.
a. true b. false
In which cellular organelle do the three posttranscriptional modifications often seen in the maturation of mRNA in eukaryotes occur?
A) Golgi B) lysosome C) nucleus D) mitochondrion E) cytoplasm