Free points cuz im bored( did i say free brainleist?)

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

What is the starting point in replication called

Abacteriophage typically attaches to the bacterium and then