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7th Grade Chapter 2

Living Things

QuestionAnswer
Stimulus a change in an organism's surroundings that causes the organism to react
Response an action or change in behavior that occurs in reaction to a stimulus
Development the process of change that occurs during an an organism's life to produce a more complex organism
Spontaneous Generation the mistaken idea that living things arise from nonliving sources
Autotroph an organism that makes its own food
Homeostasis an organism's ability to maintain stable internal conditions
Taxonomy the scientific study of how living things are classified
Species a group of organisms that can mate with each other and produce offspring that can also mate and reproduce
Nucleus the control center of a cell
Cell Wall the rigid layer of nonliving material that surrounds plant cells that protect and support the cell
Cell Membrane the outside boundary that controls which substances can enter or leave the cell
Cytoplasm the region between the cell membrane and the nucleus
Mitochondria organelles that convert energy in food molecules to energy that the cell can use
Endoplasmic Reticulum a cell structure that forms passageways in which proteins and other materials are carried through the cell
Golgi Body a structure in a cell that receives proteins and other newly formed materials from the ER, packages them, and distributes them to other parts of the cell
Chloroplast a structure in the cells of plants that captures energy from sunlight and uses it to produce food
Vacuole organelles that store food and other materials needed by the cell
Lysosome organelles that release chemicals that break down large food particles into smaller ones
Prokaryote organism whose cell lacks a nucleus
Eukaryote organism whose cell contains a nucleus
Resolution how sharp an image is
Created by: Mrs. Gordon
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