The optimal pH for enzyme 1 is:
a. 2.
b. 3.
c. 4.
d. 5.
e. 6.
B
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Echinoderms are classified as Bilateria, but although they start out as bilateral larvae, they change into radially symmetrical adults. You might hypothesize that their genes controlling the development of radial symmetry are
A. different from those controlling development of symmetry in all other radially symmetrical animals. B. similar to genes controlling body form in Porifera. C. similar to genes controlling body form in Ctenophora. D. similar to genes controlling body form in Lophotrochozoa. E. similar to a common set of genes controlling body form in Ctenophora and Lophotrochozoa.
A side effect of the Army’s solution to the
contamination problem at its Aberdeen Proving Grounds is a. increased ground-water pollution. b. the depletion of most soil nutrients. c. the restoration of the soil’s normal inhabitants. d. increased air pollution. e. none of these.
Plant species A has a diploid number of 28 chromosomes, while Plant species B has a diploid number of 14 chromosomes. Species A and B produce a hybrid through alloploidy. The diploid number of chromosomes of the hybrid is
A. 28. B. 42. C. 14. D. 21.
A hypotheses must be testable to be scientifically valid. Being testable and falsifiable means that _______.
Fill in the blank(s) with the appropriate word(s).