Ancient cyanobacteria released which assisted in creating the atmosphere as we know it today.
a. lead
b. hydrogen
c. ore
d. oxygen

What must happen before a body cell can begin mitotic cell division

7. in the cycle, a virus integrates its dna into the host's dna, and its dna is replicated when the host dna is replicated. a. infectious b. retroviral c. lysogenic d.lytic

Pls ill give u brainliest which of the following is true about science? 1. political conditions are unable to influence it. 2. economic concerns may prevent it from solving problems.