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Characteristics of Life Notes Powerpoint

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Discusses the 7 characteristics of ife.

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Characteristics of Life Notes Powerpoint

  1. 1. Characteristics of Life
  2. 2. Biotic and Abiotic influences NON-living things (Abiotic) may share some features in common with LIVING things (Biotic), but only living things show ALL the characteristics of life Abiotic- nonliving (ex. rocks, oxygen, water, sunlight) Biotic- living (ex.)
  3. 3. Organism = any living thing!
  4. 4. Biotic or abiotic? Abiotic Biotic
  5. 5. What characteristics do all living things have in common? How to remember the 7 characteristics of living things…… MR GOR Hates Cheese! M: Made of cells R: Reproduce (DNA) G: Grow/Develop O: Obtain/use energy R: Respond to environment H: Homeostasis C: Change over time (evolve) Memory Helper
  6. 6. 1)All living thing are made of one or more cells. (1) The cell is the basic unit of life that can carry out life processes.(2) All cells come from pre-existing cells (3). These three statements compose the CELLTHEORY.
  7. 7. 1) Living things are ….. Made ofCells  Unicellular: These organisms are made up of only ONE cell o Unicellular organisms must accomplish all life activities within one cell. o Example: bacteria, amoeba  Multicellular: These organisms are made up of MORE than one cell. o In multicellular organisms, cells must work together to accomplish the organism’s life processes. o Example: animals, plants
  8. 8. Are there more unicellular or multicellular organisms on earth?
  9. 9. Single celled (unicellular ) organisms makeup most organisms on Earth. They have everything they need to be self- sufficient.
  10. 10. In multi-cellular organisms, the cells specialize to perform specific functions (bone cells, skin cells, muscle cells, root cells, leaf cells). Leaf cell Red Blood Cell Yeast cell Humans are comprised of about 85 different types of cells. Can you name some??
  11. 11. 2 types of cells exist on the Earth –Prokaryotic cells –Simple and small –NO nucleus –Example: Bacteria –Eukaryotic cells –Possess organelles separated by membranes –Nucleus –Examples: Plants, animals, fungi and protist
  12. 12. Prokaryotic cell Eukaryotic cell
  13. 13. animal eukaryote eukaryote AMEOBA ANIMAL - BLOWFISH unicellular multicellular bacteria prokaryote
  14. 14. What type of cells make up humans? Prokaryotic or eukaryotic?
  15. 15. LIVING THINGS 2) Reproduce  Members of a species must have the ability to produce new individuals, or reproduce.  Reproduction is NOT essential for the survival of an individual, but IS essential for the survival of the species.
  16. 16. LIVING THINGS 2) Reproduce  The purpose of reproduction is the passing of deoxyribose nucleic acid (DNA).  DNA is the universal code that helps to make proteins.  What is heredity? The passing of the genetic code (DNA) from parent to offspring.
  17. 17. 2TYPESOF REPRODUCTION 1) ASEXUAL reproduction:This process of reproduction involves a single parent, and results in offspring that are genetically identical to the parent. Examples:
  18. 18. 2TYPESOF REPRODUCTION 2)SEXUAL reproduction: A type of reproduction in which cells from two parents unite to form the first cell of a new organism. Examples:
  19. 19. LIVINGTHINGS 3)Grow and Develop Turn and talk to your partner: What is the difference between grow and develop?
  20. 20. LIVINGTHINGS 3)Grow and Develop Growth: change in size. Development: change in structure/function. Unicellular organisms will GROW Multicellular organisms will GROW and DEVELOP
  21. 21. LIVINGTHINGS 3)Grow and Develop Life cycle = the series of stages through which a living thing passes from the beginning of its life until its death.
  22. 22. In your notes – record a new vocabulary word & definition. Also, record any questions that you may have.
  23. 23. Rapid Review 2.
  24. 24. Rapid Review 3. 4.The passing of the genetic code (DNA) from parent to offspring describes: a. Life cycle b. Species c. Heredity d. prokaryotes
  25. 25. Living things: 4)Obtain and use energy! All organisms need a source of energy (sun) for their life processes. Energy is the ability to cause an change or to do work. Metabolism is the combination of chemical reactions through which an organism builds up or breaks down materials. Examples: digestion, movement, reproduction, etc.
  26. 26. All living things fit into one of these categories depending on which way they obtain energy. 1. Autotrophs: (producers): organisms that are able to capture energy from the sun or chemicals and convert that energy to chemical energy stored in sugar. Examples:
  27. 27. All living things fit into one of these categories depending on which way they obtain energy. 2. Heterotrophs: (consumers): organisms that are obtain energy by consuming other living things Examples:
  28. 28. Example
  29. 29. Living things: 5) Respond to the Environment A STIMULUS is a signal to which an organism responds. Examples: a. How do you respond to light when you leave a dark room? b.How do plants respond to sunlight? c.What does a blowfish do when threatened by a predator?
  30. 30. 5) Respond to the Environment  Read the following statements and label the events as stimulus or response. 1. Shark swims toward the direction of the smell of blood. 2. Human blushes due to embarrassing comment. 3. A bat hears the flapping wings of an insect. 4. A person jerks hand away from a hot stove. 5. A dog chases a running rabbit. Stimulus Stimulus Stimulus Stimulus Stimulus Response Response Response Response
  31. 31. Living things: 6) Maintain homeostasis Responding to their environment allows living things to maintain homeostasis. Homeostasis: The ability of cells, tissues, and organisms to maintain a stable internal environment. **Homeostasis is about trying to stay the same inside, no matter what goes on outside!
  32. 32. How is temperature in our body regulated?
  33. 33. Organisms maintain homeostasis through the use of feedback mechanisms. Example: A) regulation of body temperature: When it is cold, humans _________________ When it is hot, humans _________________ WHY?? shiver sweat To keep our internal temperature about 98.60F
  34. 34. Other Examples of Homeostasis: B) Regulation of blood sugar levels C) Regulation of water balance in the blood
  35. 35. Living things: 7)Change over time As a group, living things evolve, or change over time. Organisms pass on traits from one generation to another by their DNA. Variations in traits are caused by mutation or changes in the DNA code. Certain variations may enhance an organism’s ability to survive and reproduce – these traits are referred to as adaptations.
  36. 36. 7)Change over time Adaptation: (heritable characteristics that increase an organism’s ability to survive and reproduce in an environment)
  37. 37. Example of adaptation: Darwin’s Finches Beak size fits food source
  38. 38. Summarizer List 3 characteristics of life List 2 things about one of the characteristic List 1 things about a eukaryotic cell MR GOR Hates Cheese!

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