Presentation on theme: "What is it? You and a friend are walking in the woods and you stumble upon this object. You tell your friend this is a living wild mushroom. Your friend."— Presentation transcript:
What is it? You and a friend are walking in the woods and you stumble upon this object. You tell your friend this is a living wild mushroom. Your friend argues and says it is not living. What would you tell your friend to make them think this object is a living organism?
LEQ: What are the characteristics of life? Name: Date: Block:
1.) made up of one or more cells Smallest unit of life Smallest thing that can carry on the functions of life Organism may be one or many cells
Cells contain hereditary material Cells are varied
2.) the ability to reproduce Without reproduction, living things would not exist to replace those individuals that die Survival of the species Some bacteria can reproduce every 20 minutes, a pine tree takes two years to produce seeds
3.) obtain and use energy Homeostasis requires energy Energy comes directly or indirectly from the sun – begins a food chain Chemosynthesis: used by certain bacteria, the formation of organic material using energy derived from simple chemical reactions
4. Grow and develop Growth occurs through taking in raw materials and making more cells Usually this is through an increase in the number of cells Some cells stop dividing: nervous and muscle tissue Development is the change an organism goes through during its lifespan
A lifespan is the maximum number of years an individual from a given species can live: --mayflies live one day --a tortoise for 180+ years --bristlecone pine tree 4,600 years --a human 122 years. http://youtu.be/R3Mt2E1M6dU http://youtu.be/R3Mt2E1M6dU
Ticket Out the Door! List 3 organ systems 2 types organs 1 type of cell
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