Which of the following would cause an error in DNA replication? A. DNA ligase connecting chunks of DNA
B. DNA polymerase pairing A with G
C. DNA polymerase checking the DNA
D. Helicase making a replication fork

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

Which is an example of a decomposer? a. bear b.algae c.grass d.bacteria d bacteria

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels