unicellular organisms. lets start with cells anyone remember what cells are? how about all those...
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The Mighty Cell These tiny, microscopic things are pretty complex They need to be able to carry out all the life processes that we do, but on a microscopic level!TRANSCRIPT
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Unicellular Organisms
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Lets Start With Cells
• Anyone remember what cells are?• How about all those organelles that they
have?• …maybe we should review
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The Mighty Cell
• These tiny, microscopic things are pretty complex
• They need to be able to carry out all the life processes that we do, but on a microscopic level!
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The Mighty Cell
• Cells have specialized parts that carry out life functions in the same way that our organs do for us
• We call them…organelles!
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• Its similar to our brain
• Regulates and controls all of the happenings inside of the cell
• Contains the DNA
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The goo: Cytoplasm
• This is the goo that everything is suspended in• If things need to get transported, it goes
through the cytoplasm (Similar to our blood)
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The Barrier; Cell Membrane
• Keeps the insides in and the outsides out• Similar function as our skin
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The Structure; Cell wall• Similar to the membrane, except it is very
rigid and gives it a definite shape• Our skeletal system does kind of the same
thing• Cell wall also keeps insides in and outsides
out
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The Food Factory; Chloroplast
• Not all cells have this• Uses energy from the sun and CO2 to make
food!• How awesome would it be if we had
chloroplasts in our skin?...Think about it…
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The Packaging System: Endoplasmic Reticulum
• Can create proteins and gets them all ready to go where they need to be
• Surrounds the nucleus
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The Assembly Worker: Ribosomes
• They make proteins• Proteins are essential for all life, with out
them we wouldn’t be here…
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The Power House; Mitochondria
• Converts food into ENERGY!!
• ‘The Mighty Mitochondria’
• Kind of the opposite of the chloroplast
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The Storage: Vacuole
• Acts as a storage place. Can store food or other materials
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The Post Office; Golgi Apparatus
• Packages and labels materials for shipment
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The Stomach; Lysosome
• Contains Digestive juices that will break down food
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Ok, now that we know about cells…
• Lets talk about some single celled organisms!!
Unicellular Organisms
Bacteria DinoflagellatesDiatoms
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Bacteria
• Lack a nucleus and other organelles!! OMG THEIR SO SIMPLE!
• 3 different shapes– Rod, spiral and round
• Reproduce Rapidly!
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Bacteria Are Important
• Decay Bacteria– Feed on dead things– Recycles nutrients back to the environment– Lots of them found at the bottom of the ocean
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Bacteria Are Important
• Blue-Green (Cyano)Bacteria– Important Producers– Maybe the first photosynthetic organisms EVER!– Can produce Reef-like structures called
stromatolites!
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Diatoms• Float near the surface
usually (that’s where the light is after all!)
• Important marine producers
• Come in a wide variety of shapes
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Diatoms
• Has a nucleus and other organelles
• Transparent cell wall lets light in
• Has 2 frustules that fit together• Spines and oil filled vacuoles
help keep the diatoms floating near the surface
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Dinoflagellates
• Quite Different! They can MOVE!!– They have 2 flagella that help them do this
• An eye spot helps them move towards the light
• Some are also bioluminescent
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Dinoflagellates
• They are photosynthetic, but they can also eat food!
• When a lot of them bloom they can cause red tides which can be dangerous for people and wild life
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Photosynthesis
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Microscope Review
• Scanning (red), focus with big knob• Low power (yellow), focus with big knob or
small knob• High power; SMALL KNOB ONLY!
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Stations
• Groups of 5 will rotate from station to station• 1 station is for prepping a slide to look at
(pondwater)• You will have 4 minutes for each station• You will sketch what you see on a sheet
resembling this;
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Diamtoms Dinoflagellates
Blue-green bacteria Pond water Critter
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Ticket Out;
• Create a Concept map for the next chapter (5)• Include all the major topics and subtopics in
the map• Homework: – Read the next chapter and take notes– Use connecting words/phrases on your concept
map for each connection