The acquired defense system only recognizes and destroys cells with antigens that come from outside the body.
Answer the following statement true (T) or false (F)
False
The acquired defense system will also recognize cancer cells with abnormal membrane proteins and destroy them.
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Which line, A, B, C, D, points to a cell that will participate in the secondary immune response?
1.A
2.B
3.C
4.D
The fibrous sac that encloses the heart is the ________.
A. myocardium B. epicardium C. ectocardium D. pericardium E. endocardium
Which of the following is not a function of a stem of a plant?
A. storage of starch B. support C. storage of water D. production of pollen E. protection from predators
The ABO blood type system in humans is an example of:
a) codominance but not multiple alleles. b) neither codominance nor multiple alleles. c) multiple alleles but not codominance. d) incomplete dominance. e) multiple alleles and codominance.