what is the function of the organelle labeled c in the diagram?

How do you date a sample of rock that you suspect as being one of the earliest on earth

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Ascientist wanted to formulate a pill to attack a specific type of bacteria that infects the throat. which biological component would be best to use as a model for the pill's function? bacteriocytes phagocytes complement antibodies