When scientists copy dna, they first have to cut out the part they want to
copy. what molecule do they use to do this?
o
a. reverse transcriptase a
b. gel electrophoresis
o
c. dna polymerase
o
d. restriction endonuclease

During sunny hours, a large amount of build up between the hours of 1: 00-5: 00 pm. a. ozone b. mercury c. lead d. sulfuric acid

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

Which part of cellular respiration must occur before any of the other steps can occur