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

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Presentation on theme: "All things considered to be alive have what characteristics in common?"— Presentation transcript:

1 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…











12 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

13 1. Have cells and DNA Unicellular Multi-cellular

14 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)



17 Multi-cellular start off a single cell…

18 2. All living things reproduce
There are 2 ways in which this can be done…

19 Types of reproduction

20 2. All living things Reproduce
There are 2 types of reproduction: Asexual : 1 parent (budding) - identical bacteria Sexual: 2 parents cats people

21 3. Living things grow and develop
What is the difference between the 2 words?


23 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…

24 4. Living things use energy to ……grow/develop/reproduce

25 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

26 Where are they getting energy from?

27 How obtain energy? Plants: From the sun’s energy “photosynthesis”
Lion: From eating other organisms “herbivore, carnivore” Mushroom: From the remains of dead organisms (decomposers)

28 6. Living things respond to stimuli


30 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

31 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

32 7. Maintain internal balance

33 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

34 Evolve over time …

35 8. Evolve over time :Evolution
100,000’s of millions of years…changes can be dramatic within a species… ex) pre-historic horse was the size of a Barbie doll horse


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