According to the modern classification scheme, which animal would be a spider's closest relative?
A. A snail
B. A tapeworm
C. An earthworm
D. A squid
E. A roundworm
Answer: E
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Fenway Park, home of the Boston Red Sox, is situated on land that was once a fen, a kind of wetland. The replacement of the fen is an example of
A) pollution. B) overexploitation. C) habitat destruction. D) competition.
By definition, menstruation begins on what day of the nonpregnant uterine cycle?
A. 1 B. 7 C. 21 D. 30
Arrange the structures through which air passes upon entering the body in the proper sequence
1) alveoli 2) bronchi 3) larynx 4) bronchioles 5) pharynx
a. 5 ? 3 ? 6 ? 2 ? 4 ? 1 b. 3 ? 5 ? 2 ? 6 ? 1 ? 4 c. 2 ? 4 ? 3 ? 5 ? 6 ? 1 d. 3 ? 6 ? 5 ? 2 ? 4 ? 1 e. 5 ? 6 ? 3 ? 4 ? 2 ? 1
Which of these makes determining the evolutionary relatedness of different species based on the amino acid sequence of homologous proteins generally less accurate than determinations of relatedness based on the nucleotide sequences of homologous genes?
A) Silent mutations B) Gene duplications C) Translocation events that change gene sequences D) Crossing-over E) Independent assortment