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35 Cards in this Set
- Front
- Back
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the basic unit of structure and function in an organism.
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Cell
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single celled organisms.
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Unicellular
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composed of many cells.
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Multicellular
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the process of change that occurs during an organism's life to produce a more complex organism.
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Development
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an action or change in behavior.
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Response
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the production of offspring that are similar to the parents.
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Reproduce
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the mistaken idea that living things arise from nonliving sources.
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Spontaneous Generation
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an experiment in which all of the variables except for one remain the same.
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Controlled Experiment
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the one factor that a scientist changes to test a hypothesis during an experiment.
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Manipulated Variable
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an organism that can make it's own food.
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Autotroph
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an organism that cannot make it's own food.
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Heterotrophs
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the process by which an organism's internal environment is kept in spite of changes in external environment.
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Homeostasis
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an instrument that makes small objects look bigger.
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Microscope
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a light microscope that has more than one lens.
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Compound Microscope
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a widely accepted explanation of the relationship between cells and living things. This states:
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Cell Theory
- All living things are composed of cells. -Cells are the basic unit of structure and function in living things. - All cells are produced from other cells. |
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the ability to make things look larger than they are.
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Magnification
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a curved lens in which the center is thicker than the edges.
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Convex Lens
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the ability to clearly distinguish the individual parts of an object.
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Resolution
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a tiny cell structure that carries out a specific function within a cell.
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Organelles
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a rigid layer of nonliving material called cellulose.
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Cell Wall
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the outside boundary of a cell; controls which substances come in and out of the cell.
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Cell Membrane
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the control center of a cell that directs the cell's activities.
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Nucleus
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protects the nucleus.
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Nuclear membrane
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material in a cell that contains DNA and carries genetic information.
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Chromatin
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where ribosomes are made.
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Nucleolus
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produces most of the energy the cell need to carry out it's functions.
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Mitochondria
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passageways that carry proteins and other materials from one part of the cell to another.
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Endoplasmic Reticulum
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a tiny structure in the cytoplasm of a cell where proteins are made.
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Ribosomes
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"cell's mailroom", receives proteins and other newly formed materials from the Endoplasmic Reticulum and sends them to other parts of the cell.
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Golgi Bodies
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organelles that capture energy from sunlight and use it to produce food for the cell.
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Chloroplasts
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the storage area for the cell.
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Vacuole
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small round structure that contain chemicals that breaks down large food particles into smaller ones.
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Lysosomes
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organisms whose cells lack a nucleus.
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Prokaryotes
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organisms whose cells contain a nucleus and many of the organelles.
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Eukaryotes
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traces of ancient organisms that have been preserved in rock and other substances.
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Fossils
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