The correct answer is C. lens. Lens is a convex sealed capsule containing a clear fluid and focuses light to the back of the eye. Iris is the colored part of the eye that contracts and expands under influence of ciliary muscle. Retina is the inner surface of back of eye. Cornea is a transparent and curved surface of eye that helps to focus light.
Phosphate groups are polar and allow the cell to exist in water.
They only vary only in their "Lipid Groups"
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movement of people from one permanent home to another. This movement changes the population of a place. International migration is the movement from one country to another. ... People who move into another country are called immigrants .
Answer: Sample Response: The windsurfer, his board, and the air and water around him are all made of matter. That matter is made up of very small particles called atoms.
