Answer:
Explanation:Ribosomes are found in the surface of rough endoplasmic reticulum.They manufacture proteins that are required for the building of cell.This is known as membrane biogene
sis
I think the answer is no C coz it creates it's own anti bodies
Neither of these are minerals, B.
Its not A because, they are not natural materials but instead made up of natural materials, like a rubber tree.
Its not C because, like I said, plastic is made from rubber trees, this garentees it doesnt have a crystal structure.
Its not D because, concrete is not a mineral and has indefinite composition.