The enzyme responsible for unwinding the DNA double helix during replication is called DNA

A. Helicase

B. Polymerase

C. Amylase

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere