characteristics of life

1. Ch. 1.1 Characteristics of Life

2. What characteristics do all living things share?
• Set up a concept map or foldable
with 6 spots & enough space to
include:
– Name of characteristic
– Description
– Pictures/examples
• Add titles for characteristics:
1. Organization
2. Growth & development
3. Reproduction
4. Response to stimuli
5. Homeostasis
6. Use of Energy

3. 1. Organization
• All living things have one or more cells.
• Unicellular organisms (1 cell) have specialized
structures that function to help it survive.
• Multicellular organisms (more than 1 cell) have
many types of specialized cells that are
organized into groups based on their functions.

4. 1. Organization
Example
Organism
Organ System
Organ
Tissue
Cell
5 Levels of Organization

5. 2. Growth & Development
• Living things grow by increasing cell size
and/or increasing the number of cells.
• Multicellular organisms develop, or change
over time.

6. 2. Growth & Development

7. 3. Reproduction
• An organism can make one or more
organisms through the process of
reproduction, which is how a species
survives.

8. 3. Reproduction
• Cells dividing
into 2 new cells
• Bird laying eggs
• Pollinated
flowers making
new seeds

9. 4. Response to stimuli
• Living things adjust and respond to
changes in their internal and external
environments.
–Stimuli = internal or external changes
(hunger, feeling cold, etc.)
–Response = the reaction to the change
(eating, shivering, etc.

10. 4. Response to Stimuli
• Internal: feeling hungry and then eating
• External: feeling hot and then sweating

11. 5. Homeostasis
• Living things are able to maintain steady
internal conditions (inside body), when
outside environment changes.
• Stable internal environment

12. 5. Homeostasis
• Keeping a body
temperature of ~ 98.6○,
regardless of weather
• Getting rid of excess
fluids

13. 6. Use of Energy
• Living things use energy for all the things
they do.
• They get energy by producing it
themselves, eating food, or absorbing
food.

14. 6. Use of energy
• Plants get energy from the sun, animals get energy
from plants
• Some don’t need sunlight for energy (deep in ocean)

15. Review questions

16. What term refers to things that have all
the characteristics of life?
a. cells
b. unicellular organisms
c. organisms
d. multicellular organisms

17. What term refers to things that have all
the characteristics of life?
a. cells
b. unicellular organisms
c. organisms
d. multicellular organisms

18. Which of these refers to changes in an
organism’s environment?
a. External stimuli
b. Homeostasis
c. Internal stimuli
d. Development

19. Which of these refers to changes in an
organism’s environment?
a. External stimuli
b. Homeostasis
c. Internal stimuli
d. Development

20. Homeostasis refers to an organism’s ability
to maintain stable ______ conditions?
a. External
b. Internal
c. Cellular
d. Environmental

21. Homeostasis refers to an organism’s ability
to maintain stable ______ conditions?
a. External
b. Internal
c. Cellular
d. Environmental

22. Which characteristic of life does this example
refer to:
mosquito larvae changing into an adult
mosquito?
a. Growth & development
b. Organization
c. Reproduction
d. Homeostasis

23. Which characteristic of life does this example
refer to:
mosquito larvae changing into an adult
mosquito?
a. Growth & development
b. Organization
c. Reproduction
d. Homeostasis

24. Which characteristic of life does this
example refer to:
a bacterium dividing into 2 bacteria?
a. Growth & development
b. Organization
c. Reproduction
d. Energy

25. Which characteristic of life does this
example refer to:
a bacterium dividing into 2 bacteria?
a. Growth & development
b. Organization
c. Reproduction
d. Energy

26. Which characteristic of life does this
example refer to:
eating because you feel hungry?
a. Response to stimuli
b. Organization
c. Reproduction
d. Homeostasis

27. Which characteristic of life does this
example refer to:
eating because you feel hungry?
a. Response to stimuli
b. Organization
c. Reproduction
d. Homeostasis

28. Which characteristic of life does this example
refer to:
your body temperature staying the same?
a. Energy
b. Response to stimuli
c. Reproduction
d. Homeostasis

29. Which characteristic of life does this example
refer to:
your body temperature staying the same?
a. Energy
b. Response to stimuli
c. Reproduction
d. Homeostasis

30. Which characteristic of life does this
example refer to:
what you need for doing all activities?
a. Growth & development
b. Energy
c. Reproduction
d. Homeostasis

31. Which characteristic of life does this
example refer to:
what you need for doing all activities?
a. Growth & development
b. Energy
c. Reproduction
d. Homeostasis

32. Which characteristic of life does this example
refer to:
groups of cells working together as a tissue?
a. Growth & development
b. Organization
c. Response to stimuli
d. Homeostasis

33. Which characteristic of life does this example
refer to:
groups of cells working together as a tissue?
a. Growth & development
b. Organization
c. Response to stimuli
d. Homeostasis

34. What kind of organism is a human?
a. Single-celled organism
b. Multicellular organism

35. What kind of organism is a human?
a. Single-celled organism
b. Multicellular organism

36. Which of the following is NOT an example of
maintaining homeostasis?
a. Sweating when hot
b. Getting a fever when sick
c. Eating when your stomach growls
d. Eyes dilating when in the dark

37. Which of the following is NOT an example of
maintaining homeostasis?
a. Sweating when hot
b. Getting a fever when sick
c. Eating when your stomach growls
d. Eyes dilating when in the dark