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chapter 1 lesson 1

what is life

cell The basic unit structure and function in living things
organism A living thing
stimulus Any change or signal in the environment that can make an organism react in some way
response An action or change in behavior that occurs as a result of a stimulus.
sexual reproduction A reproductive process that involves two parents that combine their genetic material to produce a new organism which differs from both parents.
asexual reproduction A reproductive process that involves only one parent and produces offspring that are genetically identical to the parent.
development The process of change that occurs during an organisms life to produce a more complex organism
spontaneous generation The mistaken idea that living things arise from nonliving sources
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.
homeostasis The condition in which an organisms internal environment is kept stable in spite of changes in external environment.
metabolism The combination of chemical reactions through which an organism builds up or breaks down materials
multicellular Consisting of many cells
controlled experiment An experiment in which only one variable is manipulated.
unicellular Made of a single cell
Created by: 0004639stu



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