Biology Chapter 1 Vocab

4. Factor of an experiment that scientist purposely change.
6. Collection of living matter enclosed by a barrier that separates the cell from its surroundings.
7. Well-tested explanation that unifies a broad range of observations.
10. A signal in which an organism responds.
12. Logical interpretation based on prior knowledge and experience.
14. Process by which cells from two different parents unite to produce the first cell of a new organism.
16. Set of chemical reactions through which an organism builds up or breaks down materials.
19. The use of using one or more senses to gather information.
20. Evidence or information gathered from observations
21. Microscope that allows light to pass through the specimen. Uses two lenses.
22. Hypothesis stating that life could arise from nonliving matter
23. Process in which a single parent reproduces by itself.

1. Process in which organisms maintain a relatively stable internal environment.
2. Science that seeks to understand the natural world
3. Microscope that forms an image by focusing a beam of electrons on the specimen.
4. A device that produces magnified images of structures that are too small to see.
5. Change over time.
8. Technique in which cells are broken into pieces and different parts of the cell are separated.
9. Changing one variable while keeping the other variables the same.
11. Organized way of using evidence to learn about the natural world.
13. Universal measurment system
15. Factor of an experiment that scientists want to observe. Changes based on the independent variable.
17. Possible explanation for a set of observations. (An educated guess)
18. A group of cells grown from a in a solution from a single cell.