In cases of nearsightedness the eye is
a. longer than normal.
b. shorter than normal.
c. normal, but the lens focuses incorrectly.
d. normal, but the cornea is shaped incorrectly.
e. shorter than normal with an improperly focusing lens.
A
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Pattern recognition receptors (PRRs) are found on which of the following cells?
A) macrophages B) bacteria C) neutrophils D) macrophages and neutrophils
Robert Koch and his colleagues first used agar in bacteriological media. Why was this ingredient an improvement on previous materials used to culture bacteria?
A. Bacteria growing on the solidified medium did not degrade or break down the agar. B. Agar can convert from liquid to solid form, and back again, very easily. C. Agar is a complete source of nutrients for most bacteria. D. Agar was less expensive than the nutrients that Koch was previously using in the lab.
Activated B cells differentiate into:
What will be an ideal response?
Over __________ genes are involved in skin color
determination. a. 100 b. 40 c. 10 d. 1 e. 1000