Think about the optical illusions you observed in activity 10. explain the relationship between “seeing” with the eye and “perceiving” with the brain.

The lens of the eyeball focuses light back onto the retina, where photoreceptive rods and cones are affected by the wavelength of the light. Information about the light entering the eye travels through the optic nerve, where it is then interpreted by the brain. The brain is responsible for taking raw data about light wavelengths and untangling the patterns, using memory in order to make sense of the images that the brain ultimately "sees."

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.