In an immunodiffusion test to diagnose the fungal disease histoplasmosis, a patient's serum is placed in a well in an agar plate. In a positive test, a precipitate forms as the serum diffuses from the well and meets material diffusing from a second well. In this test process, what is the most likely identity of the material in the second well?
A) antibodies
B) a purified fungal antigen
C) entire fungal cells
D) a purified protozoan antigen
E) red blood cells
B
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Mammals may ____ as a response to cold in order to limit the amount of heat lost to the surroundings
a. shiver b. go off to lay alone so that others do not take their heat c. press hair shafts close to the body d. reduce blood flow to the skin e. lose brown adipose tissue
In order to generate one glucose molecule, the Calvin cycle has to turn how many times?
A. 3 B. 6 C. 12 D. 2 E. 1
What is the correct order of events during primary succession?
A. pioneer species enter the region - shrubs begin to grow - small trees begin to grow B. pioneer species enter the region - soil formation occurs - shrubs begin to grow - small trees begin to grow C. Soil formation occurs - pioneer species enter the region - shrubs begin to grow - small trees begin to grow D. pioneer species enter the region - climax status is reached - small trees begin to grow
Bone cancer and other cancers of connective tissue are called
A. lymphomas. B. blastomas. C. carcinomas. D. sarcomas. E. leukemias.