Which is NOT an example of evolution?
A) A dog learning how to open the cabinet where its food is kept
B) Annual changes in the flu virus due to mutations
C) Flightless birds living on islands without predators
D) The development of antibiotic-resistant bacteria
E) The 2- to 3-year effectiveness of most commercial pesticides in killing insects
A
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A ddNTP, used often in DNA sequencing, lacks a(n) ________ at the ________ and ________ carbons
A) methyl; 2'; 3' B) carboxyl; 5'; 3' C) OH; 2'; 3' D) OH; 2'; 5' E) None of the listed answers is correct.
Suppose an organism has an enzyme that repairs changes in its DNA. The result is a decrease in mutations. This trait would definitely influence the organism's ability to
A) evolve. B) obtain energy. C) maintain homeostasis. D) move.
Which of the following trace elements needed by humans is commonly added to table salt?
A) iodine B) iron C) magnesium D) fluoride
In the figure above, which number identifies the structure that transmits auditory signals to the brain?
a. 2 b. 6 c. 7 d. 8 e. 9