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Which best represents the relationship among levels of organization in Ecology?
AB
C D
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SYMBIOTIC RELATIONSHIPS
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Cornell Notes
• Set Up• 1. Draw this line all the
way across the bottom of the paper leaving about 2 inches for your summary.
• 2. Draw this line that starts one line below the top line.
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EQ: (essential question)Notes: completed 1st
Key Questions completed 2nd
Summary completed 3rd
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Today’s Cornell Notes
• EQ: What type of interactions occur during Symbiosis?
• Notes: As we go through the power point you will fill in the notes area.– To begin write down the following words:
• Symbiosis• Mutualism• Parasitism• Commensalism
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Which picture represents mutualism, parasitism and commensalism?
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Symbiosis is a relationship in which two different organisms live in close
association with each other
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Here are three types of symbiotic relationships
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Mutualism ++
both organisms benefit The small green
insects (aphids)use their mouths to suck sugar from the plant. The sugar runs out through their anus providing food for the ants. The ants protect the aphids from insect predators.
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Parasitism+-
one organism benefits and the other one is harmed
The green larvae is harmed by the small white maggots. The maggots use the larvae for food.
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Commensalism+ 0
one organism benefits and the other one is unaffected (neither harmed nor benefits)
The cattle egret gets to eat the insects disturbed by the buffalo grazing in the pasture. The buffalo is not affected by the presence of the cattle egret.
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Note: It is not necessary for you to
know what the organisms are in order to figure out the correct
symbiotic relationship. Pay attention to the way the
organisms relate to one another.
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Let’s practice identifying the correct symbiotic
relationships of the organisms in the following
scenarios.
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The tick gets food from the deer without killing it. The deer is harmed
by losing blood to the tick, and possibly by getting an infected
wound.
Parasitism
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An American Robin benefits by building its nest in a Red Maple
tree. The tree is unaffected.
Commensalism
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The honey bee gets to eat the pollen from the flower. The dandelion uses
the bee to spread its pollen to another flower.
Mutualism
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Individual Practice
You have 6 scenarios on your paper.On your own correctly identify the symbiotic relationship by placing the letter M for mutualism,P for parasitism and C for commensalism in the blanks.
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What is predation?
Predation is the act of
one organism killing another for food.
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On your paper, write down your own two
examples of predation
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What is the difference between parasitism and predation?
Parasitism harms the organism and usually lives in or on it’s host and may slowly or eventually lead to the host’s death.
Predation is immediate conquer and eat. (predator-prey)
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Identify whether the following scenarios are
predation or parasitism
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Predation
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Female mosquitoes ingest blood from humans and
mammals for the protein to feed their larva. The saliva of the mosquito causes the skin to become irritated and itchy.
Parasitism
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The Lioness stalks a herd of water buffalo until she finds a young buffalo on its own and she attacks, kills and drags it
back to her pride.
Predation
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Parasitism
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Key Questions
• As a class lets come up with a level 1 question.
• As a table using costa’s levels of questioning I want you to write a level 2 question for your notes.
• (these questions should be written down in the left hand column of your notes.
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Key Questions
• On your own come up with a level 3 question
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Summary
• Using at least 4 vocabulary words you learned today I want you to write a paragraph explaining what type of interactions occur during symbiosis.
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When done it should look similar to these notes.