When combined in the correct ratio, hydrogen and oxygen atoms can form water as show below. + Hydrogen Oxygen Water In this example, water is an example of which of the following? Molecules of an element O Molecules of a compound O Atoms of a compound O A mixture

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.