All things considered to be alive have what characteristics in common?

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All things considered to be alive have what
characteristics in common?

• Make a list of reasons why you think the
  following organisms are considered alive.
• Group that comes the closest wins

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8 characteristics of living things

• Have cells and DNA
• Reproduce
• Grow and Develop
• Use energy
• Have a need for materials and energy
• Respond to environment
• Maintain internal balance
• Evolve over time as a species

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1. Have cells and DNA

• Unicellular
• Multi-cellular

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1. HAVE CELLS AND DNA

• Multi-cellular cells differentiate from a single
  fertilized egg cell, and they just know to
  become a heart, leg etc.
• Uni-cellular one celled organism (amoeba or
  bacteria)
• Both above have DNA ( the genetic code which is
  why we look like our parents)

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Multi-cellular start off a single cell
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2. All living things reproduce

• There are 2 ways in which this can be done

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Types of reproduction
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2. All living things Reproduce

• There are 2 types of reproduction
• Asexual 1 parent (budding) - identical
• bacteria
• Sexual 2 parents
• cats
• people

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3. Living things grow and develop

• What is the difference between the 2 words?

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Growth and Development

• Bacteria- grow, they just increase in size
• People develop they increase in size and
  their bodily functions change over time.until
  they become an adult
• ex) puberty

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4. Living things use energy to grow/develop/repr
oduce
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Living things use energy to grow/develop/reproduce
or just stay alive

• Where do we get energy from?
• Metabolism combination of chemical reactions
  through which an organism builds up and breaks
  down materials (will release energy) as it
  carries out life processes
• Fast metabolism- break down
• Slow metabolism store for later

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Where are they getting energy from?
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How obtain energy?

• Plants From the suns energy photosynthesis
• Lion From eating other organisms herbivore,
  carnivore
• Mushroom From the remains of dead organisms
  (decomposers)

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6. Living things respond to stimuli

• http//www.fotosearch.com/video-footage/time-lapse
  -flower_2.html

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6. Respond to stimulus

• Stimulus- signal to which an organism responds
• Response- (what they do because of the signal)
• Internal stimulus- ex.) sugar levels drop? then
  you feel hungry
• External ex.) flower leans toward the window in
  a classroom

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Practice Stimulus and Response

• My niece kicked me in the shin and I screamed
• I slammed the door and the class jumped
• I turned the light on and the mouse ran under the
  table
• I placed my hand on the hot stove and I yanked it
  back and yelped

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7. Maintain internal balance
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7. Maintain internal balance

• External conditions may vary widely
• But internal. Should be kept constant.. This is
  homeostasis
• Ex) temperature 98.6 F, water content, etc
• Ex of how it happens?
• Shivering/sweating
• Thirst/feeling of fullness

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Evolve over time
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8. Evolve over time Evolution

• 100,000s of millions of yearschanges can be
  dramatic within a species
• ex) pre-historic horse was the size of a Barbie
  doll horse

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