I’m not sure but I think the answer is B or D
On top of each kidney lies Adrenal gland. It's part of endocrine system. It's responsible for producing hormones like adrenalin, also steroids like aldosterone and cortisol. So in this case answer to your question is Adrenal gldans lie on top of kidneys
Answer:
Channel protein.
Explanation:
Channel protein have gate that opens and close which allow the passage of polar substance or ions to move to permeable membrane of the cell by diffusion. They are water filled and allow the movementof charged molecules inside and outside the cell membrane i.e polar molecules move through non polar bilayer of the cell membrane.
Yes. Penguins do have knees.
A penguin's leg is composed of a short femur, knees, tibia, and fibula.
It may seem that penguin's don't have knees when they waddle. This is because the upper leg bones of penguins are covered by its feathers, making it appear as though they have very short legs.
