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Lecture 1

BIO 1530 Lecture Notes - Lecture 1: Ovule, Fruit Anatomy, Endosperm


Department
Biology
Course Code
BIO 1530
Professor
Jon Houseman
Lecture
1

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Mesozoic Keywords
Mesozoic Age of the reptiles
Begins by Permian Mass Extinction event
Continents drifted apart.
Pangea During the early Mesozoic era, all the land
massed drifted towards each other forming
Pangaea
Started drifting apart during early middle
Jurassic Period.
End Triassic Extinction Mass extinction, more then 50% of
organisms died
Allowed dinosaurs to become dominant
Jurasic Age of reptiles
Beginning is marked by end of Triassic and
Jurassic mass extinction event
Cretaceous Last period of Mesozoic era
New groups of mammals, birds and
flowering plant
Ended with mass extinction of dinosaurs
Vertebrate Animals who possess a back bone or spine
Allowed for additional support of the body
Amniote Animals For species to live on land, this is these
animals method.
Place embryo in amniotic fluid sac, which
prevents water, lost.
The very first vertebrates left all predators
behind in the ocean and put their eggs in
here, these eggs have no reason to be
preyed upon.
The development of amnion enabled the
eggs to be laid on land for the first time in
vertebrate evolution
Oviparious Reproduction Laying eggs in which the embryo develops
outside the mothers body and then hatches
These are amniote animals
Ex:birds and reptiles
Amniote Egg:
Allantois Sac that contains all the metabolic waste
and helps exchange gas
Albumen A protein that when is broken down
contains a lot of metabolic water
Water reserve.
Keratin Beta Found in reptiles and gives more rigidity to
skin
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