biology

3. - an inorganic ion required in small quantities by living organisms.
7. - an enzyme that catalyzes the breakdown of proteins.
8. - the polysaccharide that is used as an energy store in plant cells.
9. - organic substances required in small quantities in the diet.
11. - a liquid in which another substance is dissolved.
13. - a structure made up of a group of tissues, working together to perform specific functions.
14. - a green, light-absorbing pigment found inside chloroplasts in plant cells.

1. - a sticky film, containing bacteria, that builds up on teeth.
2. - a feature of an organism that helps it survive in its environment.
4. - a bundle of axons or dendrons belonging to many different neurons.
5. - an animal that gets its energy by eating plants.
6. - the part of the eye that contains receptor cells.
10. - a term used to describe a cell that has lost a lot of water, becoming soft.
12. - taking substances into the body through the mouth