The answer is A. Pollutant
Explanation:
under what circumstance does a negative cell presents An antigen to another negative cell
Answer:
Explanation:
Decrease the amount of light using the iris diaphragm lever.
Explanation:
Cave lions, sabre-toothed cats, cave bears, giant deer, woolly rhinoceroses, and woolly mammoths were prevailing species of the Quaternary period. Without the dinosaurs, plant life had an opportunity to flourish during the Cenozoic era.
