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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.

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Presentation on theme: "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."— 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. Make a list of reasons why you think the following organisms are considered alive. Group that comes the closest wins… Group that comes the closest wins…

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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 Unicellular Multi-cellular 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. 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) Uni-cellular : one celled organism (amoeba or bacteria) Both above have DNA ( the genetic code: which is why we look like our parents) Both above have DNA ( the genetic code: which is why we look like our parents)

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17 Multi-cellular start off a single cell…

18 2. All living things reproduce There are 2 ways in which this can be done… 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: There are 2 types of reproduction: Asexual : 1 parent (budding) - identical Asexual : 1 parent (budding) - identical bacteria bacteria Sexual: 2 parents Sexual: 2 parents cats cats people people

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

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23 Growth and Development Bacteria- grow, they just increase in size 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 People – develop … they increase in size and their bodily functions change over time….until they become an adult ex) puberty… 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? 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 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 Fast metabolism- break down Slow metabolism – store for later Slow metabolism – store for later

26 Where are they getting energy from?

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

28 6. Living things respond to stimuli footage/time-lapse-flower_2.html footage/time-lapse-flower_2.html footage/time-lapse-flower_2.html footage/time-lapse-flower_2.html

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30 6. Respond to stimulus Stimulus- signal to which an organism responds Stimulus- signal to which an organism responds Response- (what they do because of the signal) Response- (what they do because of the signal) Internal stimulus- ex.) sugar levels drop? …then you feel hungry Internal stimulus- ex.) sugar levels drop? …then you feel hungry External: ex.) flower leans toward the window in a classroom 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 My niece kicked me in the shin and I screamed I slammed the door and the class jumped I slammed the door and the class jumped I turned the light on and the mouse ran under the table 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 I placed my hand on the hot stove and I yanked it back and yelped

32 7. Maintain internal balance

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

34 Evolve over time …

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

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