Recent studies have demonstrated evolution in some populations over a span of time as short as ____
a. single years
b. decades
c. centuries
d. thousands of years
e. millions of years
ANSWER: a
You might also like to view...
Examine this diagram of short tandem repeats found in DNA profiling of three suspects in a crime. Man 1 shares the same number of STRs as 1 in 5,000 people. Man 2 shares the same number of STRs as 1 in 10,000 people. Man 3 shares the same number of STRs as 1 in 3,500 people. DNA extracted from samples at the crime scene found 6 STR repeats, based on the data provided, it can be interpreted that
A. it is more rare to have six STRs than five or seven.
B. Man 2 must be guilty, based on this proof.
C. no conclusion can be made, because the STRs all repeat the same sequence of C-T-A.
D. Man 2 is likely guilty, considering that he has a rare STR profile that matches crime scene samples.
E. STR numbers match Man 2.
Malaria may be prevented by
A. taking prophylactic drugs. B. using bed nets sprayed with insecticide. C. eliminating standing water. D. using genetically engineered mosquitoes. E. All of the choices are correct.
Which of the following molecules can be used as a substrate for cellular respiration?
a. glucose only b. glucose and lipids only c. glucose and proteins only d. glucose, lipids and proteins only e. glucose, lipids, proteins and fatty acids
Hershey and Chase used labeled DNA and protein to determine that DNA is the genetic material in bacteria
Indicate whether the statement is true or false