Transcript Warm-Up August 21, 2006 (A-Day) - Clark

WHAT IS BIOLOGY?
Biology is science
 Bio – is a prefix that means LIFE
 logy- means the study of?
Now put it together!!
 Biology is the study of life and living
organisms!!!
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CHARACTERIZING LIVING
ORGANISMS
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How do we actually know something is alive?
What are the characteristics of living organisms?
Work with your assigned group:

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You will be given 10 minutes to identify items in the
lab table whether these are living or non-living and
why?
Complete the table assigned to the group.
Make sure to discuss, discuss, discuss …
What are the characteristics
of life?
Chapter 1-3
1. Living things are made up of
cells
Some are UNICELLULAR
-made up of single cell
Some are MULTICELLULAR
- made up of many cells
2. Living things reproduce
Asexual

Asexual
reproduction- has
only one parent

Sexual reproductionrequires two parents
Sexual
3. Living things are based on a
universal genetic code (DNA)
4. Living things grow and
develop

Growth : increase in size & shape

Development: mature over time

Living things have a life span
5. Living things obtain and use
materials and energy

Metabolism- chemical reactions through which
an organism builds up or breaks down materials
6. Living things respond to the
environment

They react to stimulus, which is any signal to
which an organism responds.
Stimulus: Sun
Response : Growth
Stimulus: Hot pan
Response : Remove hand
7. Living things maintain a
stable internal environment

Homeostasis: maintaining internal balance
Example: Sweating prevents
overheating by removing
excess heat from the
skin
8. Living things evolve
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Evolve: change over time to better survive in
an environment.
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These changes take place over a long period of
time & involve the entire population of organisms
Beaks of finches
What Are The Characteristics of
Living Organisms?
Living things…
 are made up of units called cells
 reproduce.
 are based on a universal genetic code (DNA).
 grow and develop.
 obtain and use materials and energy
 respond to their environment.
 maintain a stable internal environment
(homeostasis)
 when taken as a group, change over time- Evolution
Please read Section 1-3, pages 17-20 for clarification
Video 2 – Prentice Hall
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It’s Alive!, Part 2
Click the image to play the video segment.
Video 1 – Prentice Hall
It’s Alive!, Part 1
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Click the image to play the video segment.
Characteristics of Living Things
Section 1-3
Characteristic
Examples
Living things are made up of units called
cells.
Living things reproduce.
Living things obtain and use materials and
energy.
Many microorganisms consist of only a single cell.
Animals and trees are multicellular.
Maple trees reproduce sexually. A hydra can
reproduce asexually by budding.
Flies produce flies. Dogs produce dogs. Seeds from
maple trees produce maple trees.
Flies begin life as eggs, then become maggots, and
then become adult flies.
Plants obtain their energy from sunlight. Animals
obtain their energy from the food they eat.
Living things respond to their environment.
Leaves and stems of plants grow toward light.
Living things maintain a stable internal
environment.
Despite changes in the temperature of the
environment, a robin maintains a constant body
temperature.
Taken as a group, living things change
over time.
Plants that live in the desert survive because they have
become adapted to the conditions of the desert.
Living things are based on a universal
genetic code.
Living things grow and develop.
CLOSURE (JOURNAL)

DATE:
List 5 characteristics that distinguish living
things from non-living things.
 Reflection…
“No matter how good teaching may be, each
student must take the responsibility for his
own education”. John Carolus S.J.
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