The chemical compounds (found in an organelle) that provide physical structure and that bring about movement, energy use, and other cellular functions.
The mainentance of a stable level of internal conditions even thought environmental conditions are constantly changing.
The sum of all the chemical reactions that take in and transform energy and materials from the environment.
The high degree of order within an organism's internal and external parts and in its interactions with the living world.
The branch of biology that studies organisms interacting with each other and with the environment.
(AKA: decent with modification) Is the process in which the inherited characteristics within populations change over generations, such that genetically distinct populations and new species can develop.
A theory to explain the mechanism of evolution; states that organisms that have certain favorable traits are better able to survive and reproduce successfully than organisms that lack these traits.
Provides a normal standard against which the biologist can compare results of the experimental group.
The act of perceiving a natural occurrence, by using the senses, that causes someone to pose a question.
A conclusion made on the basis of facts and previous knowledge rather than on direct observations. Not directly testable.
(AKA: manipulated variable) Variable that differs between the control group and the experimental group. The factor that is being tested and manipulated by the experimenter.
(AKA: responding variable) The factor that is driven by or results from the independent variable. The changes you observe during the experiment (what you measure!!)
When a set of related hypotheses is confirmed to be true many times and can explain a great amount of data
Data that can be measured in numbers. Can be compared by scientists repeating others' experiments
Must be careful to prevent previous ideas from tainting both experimental process and the conclusion
compound light microscope
Microscope that shines light through a specimen and has two lenses (objective and ocular) to magnify an image.
transmission electron microsope
Transmits a beam of electrons through a very thinly sliced specimen, magnetic lenses enlarge the image and focus it on a screen or photographic plate.