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What six things do living things have?

All living things have a cellular organization, contain similar chemicals, use energy, grow and develop, respond to their surroundings, and reproduce.


The basic unit of structure and function in an organism.


Single-celled organisms.


Organisms that are composed of many cells.


The process of change that occurs during an organism's life to produce a more complex organism.


A change in an organism's surroundings that causes the organism to react.


An action or change in behavior.


To produce offspring that are similar to the parents.

Spontaneous Generation

The mistaken idea that living things arise from nonliving things.

Controlled Experiment

In this experiment, a scientist carries out two tests that identical in every respect except for one factor.


The one factor that a scientist changes.

What four things do living things need?

Living things must satisfy their basic needs for energy, water, living space, and stable internal conditions.


Organisms that make their own food.


Organisms that cannot make their own food.


The maintenance of stable internal conditions despite changes in the surroundings.

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