College Bio- Chap 1 Flashcards

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Theory

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An explanation for a general class of phenomena that is supported by a wide body of evidence.

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All Living Organisms...

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1. Cells (membrane-bound) 2. Replication (can reproduce) 3. Evolution (populations are continually evolving) 4. Information (process hereditary information encoded in genes) 5. Energy (Acquire and use energy)

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Hypothesis

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A testable statement that explains a set of observations.

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Prediction

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A measurable or observable result of an experiment based on a hypothesis.

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Cell Theory

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The theory that all organisms are made of cells and that all cells come from preexisting cells.

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Cell

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A highly organized compartment bounded by a plasma membrane containing concentrated chemicals in an aqueous solution.

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Spontaneous Generation

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Hypothesis stating that life could arise from nonliving matter.

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Evolution

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Change in a population's characteristics over time.

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Natural Selection

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How evolution occurs: 1. Individuals must vary in characteristics that are heritable. 2. Certain versions of heritable traits help individuals reproduce more than other versions.

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Heritable

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Referring to traits that can be passed from one generation to the next.