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Chapter 1 Lesson 1

What is life?

cell The basic unit of structure and function in living things.
organism a living thing
unicellular Single-celled organisms, like bacteria.
Multicellular organisms that are composed with many cells.
Metabolism The combination of chemical reactions through which an organism builds up or breaks down materials.
Stimulus A change in an organisms surroundings that causes the organism to react.
response An action or a change in behavior.
development The process of change that occurs during an organism's life.
asexual reproduction one parent produces offspring that are identical to the parent.
sexual reproduction two parents combines their genetic material to produce a new organism that differs from both parents.
spontaneous generation Living things can arise from nonliving sources.
controlled experiment A scientist carries out a series of tests that are identical in every respect except for one factor.
autograph organism's make their own food.
heterotroph organisms that can not make their own food.
homeostasis The maintenance of stable internal conditions.
Created by: 0003772stu