Which of the following should be the same in identical twins?
A) the set of antibodies produced
B) the set of major histocompatability (MHC) molecules produced
C) the set of T cell antigen receptors produced
D) the susceptibility to a particular virus
E) the set of immune cells eliminated as self-reactive
Answer: B
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All of the following are appropriate strategies for overcoming drug resistance in bacteria except
A. decreasing the use of antibiotics in agriculture. B. prudent use of antibiotics when treating viral infections. C. heightened infection control in health care facilities. D. patient compliance with dosage instructions when taking antibiotics.
Truffles
A. are ectomycorrhizas. B. are a mushroom. C. are a lichen. D. form a sheath around a root of an appropriate tree. E. are ectomycorrhizas AND form a sheath around a root of an appropriate tree.
In what part or parts of the plant life cycle does
mitosis NOT take place?
a. from zygote to sporophyte b. from spore to gametophyte c. from gametophyte to gamete d. from sporophyte to spores e. Mitosis takes place in all of these parts of the life cycle.
What is the function of the diaphragm on a compound microscope?
a) Magnifies the specimen b) Focuses light through the specimen c) Holds the microscope slide in position d) Controls the amount of light entering the condenser