What do plants need in order to make food? A. water, energy, oxygen

B. carbon dioxide, energy, oxygen

C. water, energy, carbon dioxide

D. water, oxygen, carbon dioxide

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

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.