Help me guys please :(

Ryan rears sheep for their wool. recently the quantity of wool that ryan gets has diminished. this is because the new sheep are not that wooly. ryan should add which nutrient to their feed so that the sheep becomes more wooly? a. cornb. ironc. cottonseedd. vitamin a

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

If your blood becomes too concentrated with iona, what will happen to the red blood cells