1) biology- the study of life.
2) cell- highly orgonized, tiny sturctures with thin coverings called membranes.
3) reprodution- the process by which organisms make more of their own kind from one generation to the next.
4) metabolism- the sum of all the chemical reactions carried out in an organism.
5) homeostasis- the maintenance of the external enviorment.
6) gene- sets of inherited instructionsfor making proteins.
7) heredity- the passing of traits from parent to offspring.
8) mutation- a change in the DNA of a gene
9) evolution- change in the inherited traits of species over time
10) species- a group of genetically similar organisms that can produce fertile offspring
11) natural selection- the process in which organisms with favorable genes are more likely to survive and reproduce
12) ecology-the science that studies the interactions of living organisms with one another and with the nonliving part of their enviorment.
13) HIV- a virus that destorys the immune system, causing acquired immune deficiency syndrome, or AIDS
14) cancer- a growth disorder of cells that occurs when cells divide uncontrollably within the body
15) cystic fibrosis- a fatal disorder in which abnormally thick mucis builds up in many organs, including the lungs
16) observation- the act of noting or perceving objects or events using the senses
17) hypothesis-an explanaton that might be true -- a statement that can
