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Unit 1 test practice
Scientific method, Characteristics of life, levels of organization
| Term | Definition |
|---|---|
| Stimulus | signal from the environment |
| the sum total of chemical reactions in an organism | metabolism |
| maintenance of a stable internal environment | homeostasis |
| adaptation | Adjustment in an organisms traits that occurs over long periods of time |
| A specialized structure within a cell, that has a specific function | organelle |
| Tissue | A group of similar cells that work together to perform a specific function in an organism |
| Organ | A part of an organism, typically self-contained and with a specific vital function, composed of different types of tissues. |
| Organism | an individual living entity |
| Population | A group of individuals of the same species living in a specific area, capable of interbreeding |
| Reproduction | process of creating new individuals of the same species |
| Heredity | the passing down of traits from parent to offspring |
| DNA | the molecule where genetic information/instructions are stored |
| Development | gradual change in an organism’s shape and function over its lifetime |
| Growth | increase in size or mass |
| Cell | The basic unit of life; a small, self-contained unit enclosed by a membrane, capable of performing life-sustaining functions |
| unicellular | made of only one cell |
| multicellular | made of multiple cells |
| Biology | the study of life |
| Community | Different populations of various species living together and interacting in a defined area |
| Ecosystem | A biological community of interacting organisms and their physical environment. |
| biotic factors | living things within an ecosystem |
| abiotic factors | non-living components of an ecosystem |
| Biosphere | The global sum of all ecosystems |
| Observation | information gathered usually using your senses, in an orderly way |
| Hypothesis | a scientific explanation that can be tested through experimentation |
| Controlled Experiment | an experiment in which only one variable is changed |
| Control group | The group that has no changes in the independent variable. |
| Independent variable | the variable that is deliberately changed in an experiment |
| Dependent variable | the variable that is observed and changes in response to the independent variable |
| Constants | all the factors that stay the same |
| Inferences | subjective explanations for an observation, usually based on past experiences and judgment |
| what is the largest level of organization in biology? | biosphere |
| The atom is the basic unit of life (true or false?) | false |
| In biology, structure is related to function (true or false?) | true |
| Unicellular organisms have tissues (true or false?) | false |
| unicellular organisms organize in populations (true or false?) | true |
| the independent variable goes where on a graph? | x- axis |
| the dependent variable, goes where on a graph? | y-axis |
| atoms and molecules are living or non-living? | non-living |
| Name the levels of organization that come before and after "cell" | organelle and tissue |
| Name the levels of organization that come before and after "ecosystem" | community and biosphere |
Created by:
lclark523
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