What is a necessary component of a powerful immune system?
A. immunological tolerance
B. strict temperature homeostasis
C. thousands of different Ig genes
D. a large thymus gland
A. immunological tolerance
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A team of researchers is studying the external structures on the dorsal (back) surface of a spider mite. The spider mite seems to be the habitat of an even smaller mite, which is approximately 0.05mm. While they can see the dorsal surface of the spider mite with their naked eye, they cannot see the mite clearly. The researchers are writing a grant to provide support for a microscope to use to
study these new mites. They need to purchase a microscope with a high magnification to observe the new mites on their habitat. Based on the information given, what type of microscope would you suggest? A. scanning electron microscope B. no microscope is powerful enough to see the smaller mite C. binocular compound light microscope D. transmission electron microscope
To prevent swollen thyroid glands, many nations add iodine to
A. milk. B. soda pop. C. salt. D. processed meats. E. orange juice.
If a person were born with the inability to produce pepsin, how would this affect his or her digestion?
A) He or she could not break down lactose. B) He or she would digest proteins with difficulty. C) He or she would fail to metabolize glucose. D) He or she would no longer be able to absorb DNA.
Only glucose can be used for cellular respiration.
Indicate whether the statement is true or false.