If a population of 1000 individuals has 160 aa genotypes, the genotype frequency of the aa genotypeis:a
0.016.
b. 0.08.
c. 0.16.
d. 0.8.
e. 1.0.
C
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The coelom forms in two different ways. Which of the following statements best compares those ways?
A. In schizocoelous development a solid mass of mesoderm splits to form the coelom whereas in enterocoelous development a layer of mesoderm cells forms a pocket off of the developing gut to form the coelom. B. In enterocoelous development a solid mass of mesoderm splits to form the coelom whereas in schizocoelous development a layer of mesoderm cells forms a pocket off of the developing gut to form the coelom. C. In enterocoelous development the coelom forms inside the mesoderm whereas in schizocoelous development the coelom forms on the outside of the mesoderm. D. In schizocoelous development the coelom forms within the mesoderm whereas in enterocoelous development, no coelom is formed at all. E. Schizocoelous and enterocoelous both form the coelom in identical ways, the difference merely being that the term schizocoelous is used only for deuterostomes and enterocoelous is used only for protostomes.
Which greenhouse gas is released by bacteria engaged in anaerobic metabolism?
a. nitrous oxide b. carbon dioxide c. methane d. ozone
The extraembryonic membrane that secretes fluid around the developing embryo is the
a. allantois. b. amnion. c. chorion. d. yolk sac. e. both the allantois and the yolk sac.
Many enzyme-catalyzed reactions are freely reversible; however, some key steps require separate enzymes for the reverse step in order to provide for independent regulation of anabolic and catabolic pathways.
Answer the following statement true (T) or false (F)