Graft-versus-host disease results under which conditions?
A) when immunocompetent cells are placed in an immunocompromised host
B) when immunodeficient cells are placed in an immunocompetent host
C) any time tissue is not exactly matched in a transplant
D) only when adult cells are transplanted into a baby
Ans: A) when immunocompetent cells are placed in an immunocompromised host
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________ are cyclic nitrogenous bases with two rings and pronounced aromatic properties.
A. Fatty acids B. Quinones C. Purines D. Amino acids
The hundreds of species of Drosophila in Hawaii exhibit different mating rituals. This isolating mechanism is
A. prezygotic and behavioral. B. prezygotic and temporal. C. prezygotic and geographical. D. postzygotic and mechanical. E. prezygotic and ecological. 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 reproductive isolation mechanisms? 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?
The endoplasmic reticulum
a. is found in both a rough and a smooth form. b. is the inner membrane of the mitochondria. c. is responsible for packaging proteins for transport. d. manufactures ATP. e. is found in the nucleus as well as in the cytoplasm.
Select the membrane molecule that is made up of a polar region with two nonpolar fatty acid tails.
A. transmembrane proteins B. cell surface proteins C. carbohydrate chains D. phospholipids