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Needs of Living Things

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Needs of Living Things Characteristics of Living Things Cellular Organization Uses energy Contain Similar Chemicals Respond to surroundings Reproduce Grow and Develop ... – PowerPoint PPT presentation

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Title: Needs of Living Things


1
Needs of Living Things
2
Characteristics of Living Things
  • Cellular Organization
  • Uses energy
  • Contain Similar Chemicals
  • Respond to surroundings
  • Reproduce
  • Grow and Develop

3
Cellular Organization
  • All living things are composed of cells
  • Unicellular single-celled organisms (ex.
    Bacteria)

4
Cellular Organization
  • Multicellular organisms that are composed of
    more than one cell (ex. Humans)

5
Chemicals of Life
  • All living things contain similar chemicals
  • The most abundant chemical in cells is water

6
Use Energy
  • All living things use energy to do the things
    that living things must do (ex. Grow and repair
    injured parts)

7
Growth and Development
  • Growth is the process of becoming larger
  • Development is the process of change that occurs
    during an organisms life to produce a more
    complex organism

8
Response
  • A Response is when a living thing reacts to
    stimuli
  • Stimuli is a change in your surroundings

9
Response
  • All living things respond to stimuli
  • Living things respond in different ways
  • The ways in which living things respond is called
    behavior

10
Response
  • Migration to warm places in a response
  • Hibernation (sleeping) through the winter months
    is another example

11
Reproduction
  • Reproduction is the process by which living
    things produce new organisms (offspring) like
    themselves.

12
Spontaneous Generation
  • Spontaneous Generation is the idea that living
    things come from nonliving things.
  • Francesco Redi disproved this theory.

13
What Do Living Things Need?
  • Water
  • Energy
  • Living Space
  • Stable Internal Conditions

14
Water
  • Plants animals cannot survive without water

15
Water
  • Water is used to transport stuff through living
    things
  • Water is necessary to carry out chemical changes
    in living things

16
Energy
  • All energy comes from the sun
  • Autotrophs (organisms that make their own food)
    get their energy directly from the sun

17
Energy
  • Heterotrophs (organisms that cannot make their
    own food) get their energy indirectly from the
    sun

18
Living Space
  • Living space includes air, water, sunlight, food,
    and shelter
  • Organisms need living space to survive
  • Organisms compete for living space

19
Stable Internal Conditions
  • Proper temperature is necessary for living things
    to carry out life processes
  • Many living things would die without homeostasis

20
Stable Internal Conditions
  • Homeostasis is the ability of a living thing to
    keep conditions inside its body constant

21
Stable Internal Conditions
  • Homeostasis keeps life processes working even if
    external temperature changes

22
What are Life Processes?
  • Life processes are the things an organism must do
    to stay alive
  • Living things carry out all life processes

23
Life Processes
  • Ingestion
  • Digestion
  • Respiration
  • Excretion

24
Life Processes
  • Ingestion
  • taking in food
  • Digestion
  • breaking food down so it can be used

25
Life Processes
  • Respiration
  • using oxygen to get energy from food
  • Excretion
  • getting rid of waste
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