How closely related two species are to one another (or not), can be seen in the similarities found in which of the following?
a. their DNA sequences
b. their homologous structures
c. their vestigial structures
d. their adaptations
a. their DNA sequences
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During which of the following processes is ATP NOT made DIRECTLY?
a. glycolysis b. pyruvate oxidation c. citric acid cycle d. oxidative phosphorylation e. glycolysis and pyruvate oxidation
The Cnidarians possess:
a. a water vascular system. b. bi-lateral symmetry. c. stinging cells. d. spicules. e. setae.
The ? chain of adult hemoglobin is composed of 146 amino acids of a known sequence. In comparing the normal ? chain with the ? chain in sickle-cell hemoglobin, what alteration is one likely to find?
A) trinucleotide repeats B) extensive amino acid substitutions C) glutamic acid replacing valine in the first position D) frameshift substitutions E) valine instead of glutamic acid in the sixth position
How is it that vertebrates are able to produce antibodies to virtually every foreign antigen with which they come in contact?
What will be an ideal response?