If an individual carries a mutation that results in a complete lack of MHC class I proteins, how would the individual's immune response be affected? Select all correct choices
A. Memory cell antibodies would not be able
to attach to antigen epitopes.
B. Cytotoxic T cells would not be able to
target (and destroy) infected cells.
C. Helper T cells would not be able to
interact with antigen-presenting cells.
D. Plasma cell antibodies would not be able
to attach to antigen epitopes.
B
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In 1938, scientists found a population of coelacanths in the Indian Ocean. This fish species is considered a “living fossil” and appears not to have changed morphologically for 80 million years. This discovery supports the ___________ model of evolution.
A. gradualism B. punctuated equilibrium C. adaptation D. natural selection E. common descent Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about punctuated equilibrium? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Ovulation is indicated by
a. A. b. B. c. C. d. D. e. E.
__________ include conifers, cycads, ginkgos, and
gnetophytes. Fill in the blank(s) with the appropriate word(s).
Which of the following compounds do mast cells produce?
A) defensive proteins B) antihistamines C) histamine D) antibodies