Which of the following best describes the conversion that occurs during nitrogen fixation?
A) ammonium to nitrate
B) nitrate to ammonium
C) nitrogen to ammonium
D) nitrogen to ammonium or nitrate
C
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A human X-linked gene is ____
a. found only in males b. more frequently expressed in females c. found on the Y chromosome d. transmitted from father to son e. found on the X chromosome
Large quantities of antibodies that react to the second entry of antigen and lead to formation of antigen-antibody complexes occurs in
A. anaphylaxis. B. delayed hypersensitivity. C. serum sickness. D. hemolytic disease of the newborn.
The capillaries that wrap around each muscle fiber are located within the __________
Fill in the blank(s) with the appropriate word(s).
Who is a carrier of an X-linked trait?
A. Homozygous dominant female B. Heterozygous female C. Homozygous recessive female D. Homozygous male E. Heterozygous male