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Introduction

Introduction to living things

TermDefinition
organism A living thing.
cell The basic unit of structure and function in living things
unicellular Made of a single cell.
multicellular Consisting of many cells.
metabolism The combination of chemical reactions through which an organism builds up or breaks down materials.
stimulus any change or signal in the environment that can make an organism react in some way.
response An action or a change in behavior that occurs as a result of a stimulus.
development The process of change that occurs during an organism's life to produce a more complex organism.
asexual reproduction A reproductive process that involves only one parent and produces offspring that are genetically identical to the parent.
sexual reproduction A reproductive process that involves two parents that combined their genetic material to produce a new organism which differs from both parents.
spontaneous generation The mistaken idea that living things arise from nonliving sources.
controlled experiment An experiment in which only one variable is manipulated at a time.
autotroph An organism that is able to capture energy from sunlight or chemicals and use it to produce its own food.
heterotroph An organism that cannot make its own food and gets food by consuming other living things.
homeostatis The condition in which an organism's internal environment is kept stable in spite of changes in the external environment.
classification The process of grouping things based on their similarities.
taxonomy The scientific study of how living things are classified.
binomial nomenclature The classification system in which each organism is given a unique, two-part scientific name indicating its genus and species.
genus A classification grouping that consists of a number of similar closely related species.
species A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.
prokaryote A unicellular organism that lacks a nucleus and some other cell structures.
nucleus
eukaryote An organism whose cells contain a nucleus.
Created by: abuddana
 

 



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