A, annuals, is the correct answer.
It’s 100x more acidic than 5
I would say D because mechanical weathering is the breaking up of rocks by physical forces
After the macrophage fails the Helper T Cell stimulates the B cells if pathogen is extracellular and Cytotoxic T Cells if the pathogen is intracellular. Once the pathogen is killed the B Cells create Memory B Cells and the Killer T Cells create memory T Cells.
