Answer:
Fluid friction
Explanation:
It is known as drag force it cant be static friction because it cant move cant be rolling friction because its not rolling its in the sky its not sliding friction because its not going down a hill or a slide
So the Answer is Fluid friction
Channel proteins help large molecules pass through the cell membrane.
Because you get most of the vitamin D for the sun and it can help or damage your skin.
The function of the excretory system is to remove wastes (excrete wastes).
Photosynthesis
Photosynthesis is the production of ATP through the conversion of energy from sunlight using chlorophyll.
Chlorophyl is found in plants, and plants use sunlight to make energy.
That energy is in the form of ATP.
