After the macrophage fails the Helper T Cell stimulates the B cells (create antibodies) if pathogen is extracellular and Cytotoxic T Cells (killer T cells, release perforin) if pathogen is intracellular. Once the pathogen is killed the B Cells create Memory B Cells and the Killer T Cells create memory T Cells.
<span>Hope that's helpful.</span>
Answer:
More?
Explanation:
Is there an image you can submit?
Answer:
I think the correct answer is option ( A )
Explanation:
I'm not sure
The combustion of fossil fuels like coal, petroleum and other factory combustibles is a major cause of air pollution. ... Meanwhile, emissions caused by gasoline-burning vehicles – i.e. CO, CO², nitrogen oxides, particulates and water vapor – are also a significant source of air pollution.
I say Air Pollution
Answer: The phosphate group has the chemical composition 
.
Explanation:
A phosphate group is a group where one phosphorus atom is attached to four oxygen atoms.
The oxygen atoms are attached to the phosphorus atom via single bond and one oxygen atom is attached to the phosphorus atom via double bond.
The chemical formula which represents a phosphate group is .
Thus, we can conclude that phosphate group has the chemical composition .
