Which of the following features would be used to construct a phylogenetic tree?
A. homologous structures
B. mtDNA sequences
C. fossil record data
D. amino acid sequences
E. All of the answer choices are correct.
Answer: E
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Red muscle fibers produce ATP mainly by aerobic respiration and their bright red color comes from ____
a. blood b. hemoglobin c. carbon dioxide d. sarcomeres e. myoglobin
The single strand of mRNA that is produced during transcription has the same polarity as the ________ strand of DNA
A) template B) nontemplate C) leading D) lagging E) nonsense
When a farmer grows cotton containing the gene for Bt toxin, insects that are resistant (rr) survive and reproduce. These insects were resistant because Select one:
a. the insects were able to produce gametes that were resistant to the insecticide. b. the insects wanted to survive the insecticide and mutated their DNA. c. by random chance some insects did not die from the insecticide. d. the insecticide caused mutations to generate resistant alleles. e. they inherited the alleles that made them resistant.
In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of the allele a is 0.4. What is the percentage of the population that is homozygous for this allele?
A) 4 B) 16 C) 32 D) 36 E) 40