Sickle-cell disease results in malformed hemoglobin molecules. Which cell type contains millions of hemoglobin molecules per cell?
A. red blood cells
B. neurons
C. osteoblasts
D. white blood cells
Answer: A
Biology & Microbiology
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The stroma is located in the mitochondrion and is the place where the light reactions of photosynthesis take place.
a. true b. false
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Which of the following is an induced defense?
A) bright coloration of poison dart frogs B) high-pitched alarm calls by a squirrel C) background color matching by a chameleon D) walking sticks resembling twigs
Biology & Microbiology
When the immune systems no longer distinguishes between self and nonself, _____ can result
a. autoimmunity b. anaphylaxis c. viral infections d. minor allergic reactions e. enhanced immune response
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