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BIOL 1902 (382)
Lecture

Oct 24.docx

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Department
Biology
Course Code
BIOL 1902
Professor
Michael Runtz

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Description
 Bugs have probing mouthparts called STYLETS o Sap (in phloem tissues) Analogous structures  Plant tissues are hard to eat o Ingesting: dealing with plants outside the body  Slugs and snails break off plant tissues with a RADULA  Caterpillars have MANDIBLES o Scoops up plant materials  Mammals use modified teeth (incisors) o Incisors: never stop growing and shelf-sharpen  Behind -> dentine softer at back of incisors  Mooso haLarge cheek teeth grind up the food  Ruffed Grouse eat a lot of buds  Spruce Grouse eat conifer needles Problems  Digestion o Slugs and snails produce digestive enzymes  Get help from bacteria living
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