How is adaptive immunity different from innate immunity?
a. adaptive immunity is specific, while innate immunity is not.
b. adaptive immunity has memory, while innate immunity does not.
c. adaptive immunity is immediate, while innate immunity is not.
d. adaptive immunity is specific, while innate immunity is not; adaptive immunity has
memory, while innate immunity does not.
e. adaptive immunity has memory, while innate immunity does not; adaptive immunity is
immediate, while innate immunity is not.
D
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In Figure 23-2, the pair of organisms that have the most recent ancestor is:
a. 2 and 4.
b. 6 and 4.
c. 4 and 5.
d. 2 and 3.
e. 1 and 2.
Water molecules can form hydrogen bonds with _____
A) compounds that have polar covalent bonds B) oils C) oxygen gas (O2 ) molecules D) chloride ions
Which region of the visible spectrum is not absorbed well by chlorophyll?
a) blue. b) violet. c) green. d) red.
The metacarpals are most often thought of as forming the ____ of humans
Fill in the blank(s) with the appropriate word(s).