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Single vs. Multiple Cells: Reproduction, Food, Environment, and Injury

Explore the advantages and disadvantages of unicellular and multicellular organisms in terms of reproduction, finding food, adapting to environmental changes, and responding to injuries. Learn more through the provided video.

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Single vs. Multiple Cells: Reproduction, Food, Environment, and Injury

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  1. One or many cells? Advantages and Disadvantages

  2. Part 1: Reproduction • Using the cards provided complete the table on your worksheet. Asexual Sexual

  3. Unicellular reproduction • It is time efficient and there is no need to search for mate. It requires less energy.(Cell division) Advantage • There is no variation - if the parent has a genetic disease, then the offspring does too. Disadvantage • It is less complex so it is completed in a very short period of time. Advantage • This usually produces multiple offspring. Advantage

  4. Multicellular reproduction • There is a need to find a mate, and this requires more energy and is less efficient. Disadvantage • There is much variation, and uniqueness, so the organism is more protected. Advantage • It is more complicated so it can take several months to complete. Disadvantage • This usually produces two or fewer offspring. Disadvantage

  5. Part 2: Finding food Unicellular Multicellular What are characteristics of each, which is simpler?

  6. Unicellular Advantage: • They are smaller in size so they do not need special food and it is easy. Disadantage: • They are so small they cannot move to find other food.

  7. Multicellular Advantages • They eat different food than other species • Some organisms can eat more than one type of food Disadvantages • They have to hunt and complete for food • They need special cells to process different food sources

  8. Part 3: Environmental Changes Vacuole = holds water Paramecium Less water available Unicellular organisms reproduce quickly/change quicker Paramecium is a small organism How do they develop larger vacuole over generations? Empty Vacuole = holds no water

  9. Part 3: Environmental Changes Less water available Multicellular organisms reproduce much slower /take much longer to change. Flower is larger more complex organism Why did the flowers die and not the paramecium?

  10. Part 4: What happens if the organism is injured? Antibiotic What happens to the bacteria? The whole cell dies!

  11. Part 4: What happens if the organism is injured? 2 inch cut from broken glass What happens to the person? The cut heals!

  12. Unicellular organism working • There are 15 different jobs and only 1 person, who works all the time!

  13. Multicellular organism working • There are 15 different jobs and 15 people to do the work! They share jobs!

  14. Watch a video! • https://edpuzzle.com/media/57f29620e865d46722965e73

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