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Biol 1902 Questions And Verified Answers

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BIOL 1902 QUESTIONS AND VERIFIED ANSWERS

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Trichomes


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Ragweeds and Mullein have these, plant hairs for smaller animals like
insects that have trouble walking through it, give small reaction due to
glands

,Structural Components in Plants


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THese have strong materials, need ingestion when eating




Spines


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Modified leaves that prick to defend themselves




Goldenrod Gall Fly and Moth


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Have yellow flowers, uneaten flowers, round swellings called galls caused
by nsects, abnormal plant growth, put egg in the gall, larva hatches and
eats, then digs tunnel out, goes back in, and then out gain to live, also
moths, but longer and skinner than fly gall, have freeze tolerance,
woodpeckers and black capped chicacdies extract grub from goldenrod
galls




Skunks


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, Have release defense opening for sulfur alchol




Batesian Mimicry


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A type of mimicry in which a harmless species looks like a species that is
poisonous or otherwise harmful to predators, for it to work models need to
outweigh number of mimics, and needs to occur same time of year, if a
predator eats the mimic, no effect on model
ex: bald-faced hornet (stings) vs hover fly (harmless); count the wings




Cold Hardy


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Plants like trees become this, excess water is withdrawn and evaportated
from leaves, water is drawn out of cells, increases solute concentrate,
sugars added to cells increasing solute concentrate, increases flexibility of
cell membrane, some trees go this to -80 C




Detritovore


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Animals that eat on dead plant material

, Plastorn


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Bottom part of the turtle's shell




Mullerian Mimicry


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When a group of unrelated animals are all defended and bear similar
appearance, i.e. Milkweed Beetle and Milkweed Bug




Cones in Eyes


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For colour, need lots of light for these




Radula


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SLugs have these, break off plant tissue, chainsaw on cnverbelt to shred
leaves

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