Studying Living Things

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Chapter 1 Studying Living Things Section 1 What
is Life Science?
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• Organisms Living Things
• A. Characteristics of All Organisms
• 1. Cells
• a. smallest units of life
• b. found in all living things
• c. organisms can be made of
• 1 or many

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CELLS
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2. Organization a. the way cells are
arranged in a living thing
(organism) b. an organism can die if it
becomes disorganized c. energy is
needed to stay organized
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NOTE When you are ill, your body is not
completely organized. As you rest, your energy
is focused on helping your body become organized
once again.
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3. Reproduction a. process where living
things make more of their own kind
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(No Transcript)
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4. Growth a. an organism uses materials
from the environment to increase in size

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5. Development a. all the changes an
organism goes through as it grows
(ex egg ? tadpole ? frog)
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6. Response to Stimuli a. change in an
organism produced by a stimulus 1.
stimulus anything that causes a
reaction in an
organism
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DARK ROOM
Suddenly, a light is turned on.
LIGHT ROOM
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STIMULUS ? RESPONSE (light)
(pupil shrinks)
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6 Characteristics of ALL Living Things

• CELLS
• ORGANIZATION
• REPRODUCTION
• GROWTH
• DEVELOPMENT
• RESPONSE TO STIMULI

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• Organization of Organisms
• 1. unicellular organisms
• (made of 1 cell)
• -many things are only 1 cell
• 2. multicellular organisms
• (made of many cells)
• - we are multicellular

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Levels of Organization ?cells ?tissue
a group of cells working
together ?organ a group of tissues
working
together ?system a group of organs
working together
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I am ALIVE! Arrr!