In the diagram below, cell division is represented by what letter? A
D
B.
с
a
A

Which prevent errors in dna replication? a. helicase enzyme checks the dna for errors. b. each base can attach to only one other type of base. c. ribosome enzymes prevent errors from happening. d. dna contains no complementary base pairs.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Which characteristics are typical of a human population in the postindustrial stage?