Which of the following elements has the greatest atomic radius? Li Ne Rb Sr Xe

What does the process of natural selection involve

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

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.