Tiny pollen grains are mixed in water. A strong light is directed from one side. Under a microscope, little points of light can be observed moving in a random, jerky way. What are the points of light that are moving?
- Apollen grains being hit by other pollen grains
- Bpollen grains being hit by water molecules
- Cwater molecules being hit by other water molecules
- Dwater molecules being hit by pollen grains