What advantage do gymnosperms have over ferns?
A. Gymnosperms produce pollen and do not require water to reproduce.
B. Gymnosperms have alternation of generations.
C. Gymnosperms have a vascular system, which allows them to grow taller.
D. Gymnosperms can grow larger gametophytes.
E. Gymnosperms can produce flowers and fruits to aid in seed dispersal.
Answer: A. Gymnosperms produce pollen and do not require water to reproduce.
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Epistasis and multiple alleles differ in that
A) epistasis is an interaction between two genes, and multiple alleles are variants of the same gene. B) epistasis affects males and multiple alleles occur in females. C) epistasis only occurs in genes that have multiple alleles. D) in epistasis one gene masks another, but one allele cannot mask the effect of another.
What types of cells fuse together to form hybridomas for making monoclonal antibodies?
A) Bacterial cells and T cells B) Myeloma cells and B cells C) Liver cells and antibody-forming cells D) Monoclonal antibodies and myeloma cells E) None of these choices
How much urine does the average adult human excrete per day?
A) 125 milliliters (1/2 cup) B) 1,000 milliliters (1 quart) C) 250 milliliters (1 cup) D) 500 milliliters (1 pint) E) 1,500 milliliters (1.5 quarts)
Which of the following is responsible for epidemics of respiratory disease in infants?
A) rhinovirus B) adenovirus C) respiratory syncytial virus D) influenza E) Mycoplasma