Of the following invertebrate groups, the group most closely related to the chordates is the _____
a. annelids
b. mollusks
c. crustaceans
d. echinoderms
e. cnidarians
ANSWER: d
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Which of the following insect hormones acts on the body tissues to stimulate molting and metamorphosis?
A. ecdysone B. PTTH C. juvenile hormone D. brain peptide E. All of the answer options are correct.
If ancestral humans did not develop an opposable thumb, grasping fingers, and binocular vision, how might their history have differed?
A. They would have been less able to occupy the trees. B. They would have been unable to develop spoken language. C. They would have been less able to walk upright. D. They would have been unable to survive without changing their diet.
Using a pH meter, you find the pH of an unknown solution to be 8.0. How would you describe this solution?
a) weakly acidic b) strongly basic c) weakly basic d) strongly acidic
Assuming no crossing over between the gene in question and the centromere, when do alleles segregate during meiosis?
A) anaphase I B) interphase C) anaphase II D) prophase II E) prophase I