Discusses the 7 characteristics of ife.

1. Characteristics of Life

3. However…..
What Is Life?
How do we know what is alive and not
alive?
What makes things alive?

4. Studying Life
Nonliving things (abiotic)
may share some features in
common with living things
(biotic), but only living things
show ALL of the
characteristics of life.

5. Biotic or
abiotic?
Abiotic
Biotic

6. Studying Life
An organism is any one
individual living thing. There
is a huge diversity of
organisms on Earth.

7. What
characteristics
do all living
things have in
common?
How to remember the 7 characteristics
of living things……
MR GOR Hates Cheese!
M: Made of cells
R: Reproduce (DNA)
G: Grow/Develop
O: Obtain/use energy
R: Respond to environment
H: Homeostasis
C: Change over time (evolve)
Memory
Helper

8. 1)All living thing are made of one or
more cells. (1)
The cell is the basic unit of life that can
carry out life processes.(2)
All cells come from pre-existing cells
(3).
These three statements compose the
CELLTHEORY.

9. 1) Living things
are …..
Made ofCells
 Unicellular: These organisms are made up of only
ONE cell
o Unicellular organisms must accomplish all life
activities within one cell.
o Example: bacteria, amoeba
 Multicellular: These organisms are made up of
MORE than one cell.
o In multicellular organisms, cells must work
together to accomplish the organism’s life
processes.
o Example: animals, plants

10. Human body
has over 85
different cells?
Turn to your
partner and list
some.
Single celled
(unicellular) organisms
make up MOST of
organism on the
Earth.
 They have everything
they need to be self
sufficient.
In multi-cellular
organisms, the cells
specialize to perform
specific functions.

12. 2 types of cells
exist on the
Earth
–Prokaryotic cells
–Simple and small
–NO nucleus
–Example: Bacteria
–Eukaryotic cells
–Possess organelles separated by
membranes
–Nucleus
–Examples: Plants, animals, fungi
and protist

13. animal
eukaryote
eukaryote
AMEOBA
ANIMAL -
BLOWFISH
unicellular
multicellular
bacteria
prokaryote

14. What type of
cells make up
humans?
Prokaryotic or
eukaryotic?

15. LIVING
THINGS
2) Reproduce
 Members of a species must have the ability to
produce new individuals, or reproduce.
 Reproduction is NOT essential for the survival
of an individual, but IS essential for the survival
of the species.

16. LIVING
THINGS
2) Reproduce
 The purpose of reproduction is the passing of
deoxyribose nucleic acid (DNA).
 DNA is the universal code that helps to make
proteins.
 What is heredity?
The passing of the genetic code
(DNA) from parent to offspring.

17. 2TYPESOF
REPRODUCTION
1) ASEXUAL reproduction:This
process of reproduction involves
a single parent, and results in
offspring that are genetically
identical to the parent.
Examples:

18. 2TYPESOF
REPRODUCTION
2)SEXUAL reproduction: A type
of reproduction in which cells
from two parents unite to form
the first cell of a new organism.
Examples:

19. LIVINGTHINGS
3)Grow and
Develop
Turn and talk to your partner:
What is the difference between
grow and develop?

20. LIVINGTHINGS
3)Grow and
Develop
Growth: change in size.
Development: change in
structure/function.
Unicellular organisms will GROW
Multicellular organisms will
GROW and DEVELOP

21. LIVINGTHINGS
3)Grow and
Develop
Life cycle = the series of stages
through which a living thing
passes from the beginning of its
life until its death.

22. In your notes – record a new vocabulary
word & definition.
Also, record any questions that you may
have.

23. Living things:
4)Obtain and
use energy!
All organisms need a source of energy
(sun) for their life processes. Energy is
the ability to cause an change or to do
work.
Metabolism is the combination of
chemical reactions through which an
organism builds up or breaks down
materials.
Examples: digestion, movement,
reproduction, etc.

24. All living things
fit into one of
these categories
depending on
which way they
obtain energy.
1. Autotrophs: (producers):
organisms that are able to capture
energy from the sun or chemicals
and convert that energy to chemical
energy stored in sugar.
Examples:

25. All living things
fit into one of
these categories
depending on
which way they
obtain energy.
2. Heterotrophs: (consumers):
organisms that are obtain energy by
consuming other living things
Examples:

26. Example

27. Living things:
5) Respond to
the
Environment
A STIMULUS is a signal to which an
organism responds.
Examples:
a. How do you respond to light when you
leave a dark room?
b.How do plants respond to sunlight?
c.What does a blowfish do when
threatened by a predator?

29. 5) Respond to
the
Environment
 Read the following statements and label the events as stimulus
or response.
1. Shark swims toward the direction of the
smell of blood.
2. Human blushes due to embarrassing
comment.
3. A bat hears the flapping wings of an insect.
4. A person jerks hand away from a hot stove.
5. A dog chases a running rabbit.
Stimulus
Stimulus
Stimulus
Stimulus
Stimulus
Response
Response
Response
Response

30. Living things:
6) Maintain
homeostasis
Responding to their environment allows
living things to maintain homeostasis.
Homeostasis: The ability of cells, tissues,
and organisms to maintain a stable
internal environment.
**Homeostasis is about trying to stay
the same inside, no matter what goes on
outside!

31. How is
temperature in
our body
regulated?

32. Organisms maintain homeostasis through the
use of feedback mechanisms.
Example:
A) regulation of body temperature:
When it is cold, humans _________________
When it is hot, humans _________________
WHY??
shiver
sweat
To keep our internal
temperature about 98.60F

33. Other Examples of Homeostasis:
B) Regulation of blood sugar levels
C) Regulation of water balance in the
blood

34. Living things:
7)Change over
time
As a group, living things evolve, or change
over time.
Organisms pass on traits from one
generation to another by their DNA.
Variations in traits are caused by mutation
or changes in the DNA code.
Certain variations may enhance an
organism’s ability to survive and reproduce
– these traits are referred to as
adaptations.

35. 7)Change over
time
Adaptation: (heritable characteristics
that increase an organism’s ability to
survive and reproduce in an environment)

36. Example of
adaptation:
Darwin’s
Finches
Beak size fits food source

37. Summarizer
List 3 characteristics of life
List 2 things about one of the
characteristic
List 2 example and the
characteristics it represents
MR GOR Hates Cheese!