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Science

Science Chapter 4 (Cells)

QuestionsAnswers
Define organelle. A small structure found within a cell; performs a specific function in a cell.
Define Multicellular. Composed of several cells.
Define chromosomes. rod-like structures in the nucleus of a cell; contain the genetic information of a cell.
Define chloroplast. Site of photosynthesis; chloroplast in a plant cell absorb sunlight, carbon dioxide and water to make food.
Define cytoplasm. The watery substance in a cell in which the organelles are suspended; also used for transport and chemical reaction.
Define cell membrane. The part of a cell that surrounds and holds the cell continents together; controls movement of substances into and out of a cell.
Define nucleus. The control center in a cell; stores the genetic information that directs all of the cell's functions.
Define vacuole. A membrane-surrounded storage compartment cell; stores food, water and other materials.
Define cell wall. A structure surrounding plant cells that protects and supports the cell; made of cellulose.
Define flagella. Tail-like structures that propel the cell or move the substances surrounding the cell.
Define Cilia. Hair-like projections that help propel cells through the cell or move the substance surrounding the cell.`
What does the cell theory state? The cell theory states that all living things are composed of one or more cells, the cell is the basic unit of life and all cells come from pre-existing cells.
What are the two lenses in a compound microscope? Ocular and objective.
What is the circle that we see the specimen under the microscope? Field of view.
How many objective lenses do compound microscopes have? 3.
Created by: rcleland