What do paws and webbed feet have in common

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

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.

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2