A polymerase chain reaction (PCR) copies an individual gene segment in vitro with a(n) ________ primer(s)
A) individual RNA
B) individual DNA
C) pair of RNA
D) pair of DNA
Answer: D
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__________ increase the free surface area of
epithelia that absorb substances. Fill in the blank(s) with the appropriate word(s).
A population's age structure tracks ____
a. the average age of the members of the population b. how long the population has existed in the area c. the rate at which the population is aging d. the relative numbers of each age e. death rate
The type of anemia that results from a deficiency of vitamin B12 is ________; the type of anemia that results from extreme blood loss is ________
Fill in the blank(s) with correct word
In which tissue system of plants would you expect to find the guard cells?
A) Dermal tissue system B) Vascular tissue system C) Germ tissue system D) Ground tissue system