Biology Class - Chapter 1, Section 1 Powerpoint Slides - Printable for personal use by EDEC students

2. VIDEO:WELCOME TO BIOLOGY!

3. WHAT IS BIOLOGY?
• Biology - the science of life
BIO = Life
OLOGY= Study of

4. WHAT DO BIOLOGISTS DO?
• Study the diversity of life
• Research diseases
• Develop technologies
• Improve agriculture
• Preserve the environment
• And much more!

5. WHAT IS AN ORGANISM?
• Organism – anything that has or one had all the
characteristics of life.

6. VIDEO:WHAT IS LIFE?

7. CHARACTERISTICS OF LIFE
1. Made of one or more cells
2. Displays organization
3. Grows and Develops
4. Reproduces
5. Responds to stimuli
6. Requires energy
7. Maintains homeostasis
8. Adaptations evolve over time

8. 1. MADE OF ONE OR MORE CELLS
• Cell - the basic unit of life.
– All organisms are made up
of one or more cells.
– Some organisms can be
unicellular, many are
multicellular.
• Can you think of a
unicellular and a
multicellular organism?

9. 2. DISPLAYS ORGANIZATION
• Organization – the organism
is arranged in an orderly way.
– Humans are
complex, multicellular
organisms that display
organization.
• How might the human body
display organization?

10. 3. GROWS AND DEVELOPS
• Growth – results in the addition
of mass to an organism.
• Development – is the process of
natural changes that take place
during the life of an organism.
• What growth and development
does a tree undergo during its
life?

11. 4. REPRODUCES
• Reproduction – the production
of offspring
– Reproduction is essential to the
survival of a species.
• Species – a group of organisms
that can breed with one another
and produce fertile offspring.
• What would happen if a species
couldn’t reproduce?

12. 5. RESPONDS TO STIMULI
• Stimulus – anything that is part
of an environment that causes a
reaction by the organism
• Response – the reaction
displayed by the organism after
being introduced to a stimulus
• Can you think of stimuli in your
daily life?

13. 6. REQUIRES ENERGY
• Living things needs sources
of energy to fuel their life
functions.
• Most organisms, such as
animals, cannot make their
own food.
• Plants produce their own
food.
• How do humans get
energy?

14. 7. MAINTAINS HOMEOSTASIS
• Homeostasis – the regulation
of an organism’s internal
conditions to maintain life.
• During the winter, how does
your body adjust to the
season?

15. 8. ADAPTATIONS EVOLVE OVER TIME
• Adaptation – any inherited
characteristic that results
from changes to a species
over time
– An adaptation is inherited
usually to cope with a
changing environment or
preference
• Using a wolf as an
example, why might
wolves have adapted sharp
teeth?

16. ACTIVITY: LIVING, NONLIVING, OR DEAD
• In this activity, you will observe various items
and record whether you believe they are 1)
living, 2) nonliving, 3) dead.
• Record observations in lab notebook and we
will discuss after everyone is finished.

17. SECTION 1.1 ASSESSMENT
1. Describe four characteristics used to identify
whether something is alive.
2. Explain why cells are considered the basic
units of living things.
3. List some careers in biology and their
importance.
4. What is the difference between response
and adaptation?

18. ADDITIONAL ACTIVITY: PICK AND ORGANISM
• Each student may choose an organism of
their choice and use the internet to research
an adaptation that has developed over time
for that organism.
• Also, note any characteristics of life from that
organism.