The factor responsible for differentiating the embryonic gonads into testes is
a. the sex-determining region of the X chromosome.
b. the sex-determining region of the Y chromosome.
c. autosomal chromosomes.
d. male gonadal-determining factor.
e. the Sertoli cells.
B
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Lamellar bone
A. is not easily restructured. B. is organized into thin sheets of tissue. C. has its collagen fibers randomly oriented. D. is very light in weight. E. has a porous appearance.
An abnormal lateral curvature of the spine is called
A. hunchback. B. scoliosis. C. lordosis. D. kyphosis.
What is the complementary DNA base sequence to the DNA strand TGCCAT?
A) ACCGTA B) TGCCAT C) ACGGTA D) ACGGUA E) UGCCAU
What term best describes the relationship between the pronator quadratus and supinator?
A) Fixators B) Prime movers C) Synergists D) Antagonists E) Depressors