How might sperm be affected if nondisjunction occurs in a male?
A) Sperm will contain only X chromosomes.
B) Sperm will contain an X chromosome and a Y chromosome.
C) Sperm will contain only Y chromosomes.
D) Sperm will not be able to fertilize an egg.
Ans: B) Sperm will contain an X chromosome and a Y chromosome.
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The alternate complement pathway plays an important role in
A. innate immunity. B. specific immunity. C. acquired immunity. D. both innate immunity and specific immunity.
Which gland is associated with biological
clocks or biorhythms?
a. pineal b. parathyroid c. hypothalamus d. pituitary e. thymus
If molecules are taken into the cell and encased in a single membrane sac called a vacuole, the transport method used is most likely
A. diffusion. B. osmosis. C. active transport. D. endocytosis.
Which of the following is a cell type associated with sexual reproduction in fungi?
A. sporangiospore B. dikaryon C. haustoria D. pneumocyst E. mycorrhiza