Which one of the following is not an adaptation seen in birds that is necessary for winged flight?
A. Elongation of the digits of the forearm
B. Feathers
C. Bipedalism
D. Expansion of the pectoral girdle
E. Hollow bones and air sacs
Answer: A
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In females, nearly all cases of _____ cancer are associated with the human papillomavirus.
A. ovarian B. lung C. breast D. cervical E. All of the answer choices are correct.
The reactant in an enzyme-catalyzed reaction is the
A) product. B) allosteric inhibitor. C) activation energy. D) active site. E) substrate.
If the allele for presence or absence of hair is located on the maternal chromosomes #3, then the same allele is located on the paternal chromosome #3.
a. true b. false
The molecule that an enzyme acts upon is known as its
A. substrate. B. coenzyme. C. apoenzyme. D. product. E. catalyst.