Biology Vocabulary

2. a substance made of atoms of different elements bonded together in a certain ratio
7. one particular type of atom that cannot be broken down into a simpler substance by ordinary chemical means
8. all organisms and the part of Earth where they exist
10. a compound that releases a proton
11. the maintenance of constant internal conditions in an organism
13. the substances made by a chemical reaction. On the right side of equation
14. all of the chemical processes that build up or break down materials
16. the substances changed during a chemical reaction. On left side of equation
17. a mixture of substances that is the same through-out; a homogeneous mixture
18. infectious particle made of a strand of DNA or RNA surrounded by a protein coat

1. catalysts for chemical reactions in living things.
2. A jellylike fluid inside the cell in which the organelles are suspended
3. the smallest basic unit of matter
4. The powerhouse of the cell. Creates ATP by using chemical energy and oxygen.
5. any individual living thing
6. tool that provides an enlarged image of an object
9. a substance that decreases the activation energy needed to start a chemical reaction. Speeds up a reaction
12. the change in living things over time
14. form of nuclear division that divides a diploid cell into a haploid cell; important in forming gametes for sexual reproduction.
15. the division of the cell nucleus and its contents