Single Celled Organisms (Uni-Cellular)mslangssciencestuff.weebly.com/uploads/4/6/7/2/... · Single...
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Single Celled Organisms
(Uni-Cellular)
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Learning Goals
• Compare the structures and life functions of single celled organisms that carry out all the basic functions of life including: Euglena, Amoeba, Paramecium, Volvox.
• Single-celled organisms have similar and unique structures and life functions that allow them to survive and reproduce.
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Essential Questions
• How are the single-celled organisms similar and different when talking about habitat, movement, food, classification and reproduction?
• How do the structures of Euglena, Amoeba, Paramecium, and Volvox help them perform basic life functions?
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Beginning Brainstorm
• Think about essential things your body does that allows you to survive and live.
• What are things we do to survive/live and why are they important?
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Single Celled Organisms
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Introduction
• Protists are organisms that make up one of the six kingdoms of living things.
• Most protists are microscopic.
• Most protists are single-celled.
• The way in which cells function is similar in all living organisms.
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What are the single cell organisms that we are going to learn about?
• Amoeba
• Euglena
• Paramecium
• Volvox
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Meet Euglena!
• Euglena is also a eukaryotic cell.
• Euglena is classified as both plant like and animal like.
• Euglena is a type of algae.
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What does Euglena eat?
• What does Euglena eat?
• If light is available, will make own food using photosynthesis.
• If no light is available, will eat other protists (amoebas and paramecium).
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Neat Fact!
• Euglena can see by using a red “eyespot” which is used for sensing light!
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How does Euglena move?
• Euglena moves by using a flagella that whips back and forth.
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Where does Euglena live?
• Euglena lives in ponds, rivers, and marshes.
• Some live in oceans and swimming pools.
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Reproduction of Euglena
• Euglena reproduces by splitting in half (asexual reproduction/ mitosis)
• 1 splits in half and makes an identical new euglena.
• Euglena will only reproduce if well fed and in warm temperatures.
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Euglena life span
• Euglena live about 3 weeks.
• Euglena also does NOT age!
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Meet Amoeba
Amoeba is a eukaryote cell.
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What does Amoeba eat?
https://www.youtube.com/watch?v=u7IN7HTWzLs&ebc=ANyPxKqzb7284BE0za3emZlpY-tj-mJiyO1yBi6BISNNxVIB6fGZNi4XqNj8zqED6QrVY_MUg251NMHMMLaNVg8qLdXXB87MWg
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How does Amoeba move?
• Amoeba moves by using pseudopods or by changing the shape of its body.
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Where do Amoeba live?
• Amoeba lives in lakes, ponds, streams, rivers, or puddles.
• Some amoeba live in soil and as parasites in moist body parts of animals.
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Reproduction • Reproduces by splitting in half (asexual
reproduction/ mitosis).
• When amoeba splits in half, it makes 2 identical new amoebas.
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Amoeba life span
• Lives up to two days!
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Meet Paramecium!
• Paramecium is a eukaryotic cell.
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What does Paramecium eat?
• Paramecium feeds on other organisms.
• Uses cilia to sweep food into the “mouth” and then surrounds it in a food vacuole.
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How does Paramecium move?
• Paramecium moves by using cilia (small “hair-like” structures on the outside of the cell).
https://www.youtube.com/watch?v=sn3MTYNe8mM
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Environment for Paramecium
• in freshwater, brackish, and marine environments and are often very abundant in stagnant basins and ponds.
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Paramecium lifespan
• Can live for 100-1000’s (even millions) of years if left alone
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Meet Volvox!
• Classified as Plant-like.
• Also as a eukaryotic cell.
• Are a type of algae
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How does Volvox eat?
• If light is available, will make own food using photosynthesis. (has chloroplasts that contain chlorophyll).
• Also has an “eyespot” which is used for sensing light.
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How does Volvox move?
• Moves using 2 flagella (that beat together to roll the ball through water).
• And, it’s REALLY cool!
https://www.youtube.com/watch?v=d8xs8F9gln0
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Where does Volvox live?
• Lives in puddles, ditches, shallow ponds and bogs (wet spongy ground; especially : a poorly drained usually acid area).
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Lifespan of Volvox
• Lives about 2 days!
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Contains
chlorophyll
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Movement
1. How does Euglena move?
2. How does Amoeba move?
3. How does Paramecium move?
4. How does Volvox move?
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Eat
1. How does Euglena eat?
2. How does Amoeba eat?
3. How does Paramecium eat?
4. How does Volvox eat?
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Unique Characteristic
1. What is a unique characteristic of Euglena?
2. What is a unique characteristic of Amoeba?
3. What is a unique characteristic of Paramecium?
4. What is a unique characteristic of Volvox?