The major histocompatability (MHC) molecule is important in a T cell's ability to _____
A) distinguish self from nonself
B) recognize specific parasitic pathogens
C) identify specific bacterial pathogens
D) identify specific viruses
E) recognize differences among types of cancer
Answer: A
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IgG, IgM, and IgA are examples of ________ found in blood
A) antibodies B) antigens C) bacteria D) pathogens
A transcribed region of DNA has a 5' to 3' sequence TTCATGGCGAc. The 5' to 3' sequence of an RNA transcribed from this DNA would be ____
What's the answer to this?
How does DDT in the environment affect many birds?
A. stunted growth of chicks B. chronic liver failure in adults C. advancing neurological degeneration D. failed reproduction E. None of these choices are correct
How has the avian lung adapted to the metabolic demands of flight?
A) Airflow through the avian lung is bidirectional like in mammals. B) There is more dead space within the avian lung so that oxygen can be stored for future use. C) Countercurrent circulation is present in the avian lung. D) Gas exchange occurs during both inhalation and exhalation.