In response to a mismatched blood transfusion the body produces ____
a. allergen
b. antibodies
c. antigens
d. blood type proteins
e. Rh factor
ANSWER: b
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Mammals underwent an evolutionary "explosion" or major adaptive radiation in the
a. Mesozoic. b. Cambrian. c. Triassic. d. Devonian. e. Cenozoic.
Phospholipids
1.have a polar head and two non-polar tails. 2.have a non-polar head and two polar tails. 3.are soluble in water. 4.are polymers of amino acids.
Which of the following statements is INCORRECT about triploid species?
A) Triploid species have an extra copy of one chromosome. B) Triploid species have three complete sets of chromosomes. C) Triploid species are usually infertile. D) Triploid species are an example of a polyploidy organism. E) All of these choices are correct.
The specific immune response _______.
A. is the first line of defense in the immune system B. involves memory of antigens from previous exposure C. is the second line of defense after anatomical and chemical barriers D. involves millions of B and T cells - each individual cell can recognize many different antigens