Question

define cones and cornea

Answer 1

cornea is the clear and domeshaped window in the front of your eye. it focuses the light into your eye. keratoconus is when the cornea thins out and bulges like a cone

Answer 2

Answer:

Chemical contaminants are chemicals toxic to plants and animals in waterways. The phrase 'chemical contamination' is used to indicate situations where chemicals are either present where they shouldn't be, or are at higher concentrations than they would naturally have occurred.