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Mr. Gyug's Non vascular and vascular plants

all the notes about plants that are needed for bio 20

eric gyug

on 12 October 2011

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Transcript of Mr. Gyug's Non vascular and vascular plants

Plants have been evolved from early plant like protists

Moved to land to find two things:
Open space
More light
More Carbon Dioxide Plants: Non-Vascular and
Non Seed Bearing Vascular Plants Much less water

Much harder to spread young First Evolutionary Steps

Plants evolved cell walls made of cellulose
Spores to spread their offspring
Non Vascular plants (bRYOPHYTES) Cell walls have cellulose to hold onto water and hold their shape

Don't have a way to transport water through their bodies

Create spores to let the wind spread their offspring Bryophytes Don't have true leaves, stems, or roots

Can`t grow taller then about 10cm

Need to be very close to water Vascular Plants Non-Vascular Plants Seed Bearing Plants Non-Seed Bearing Plants Gymnosperms Angiosperms Monocots Dicots Plants Three Kinds of Bryophytes Mosses


Hornworts Next Evolutionary Step Started to evolve new ways to get at water and sunlight

Needed a way to transport water and food over long distances Vascular Plants Evolved Vascular tissue to transport food from the leaves and water from the roots

Two kinds: Xylem and Phloem Xylem transports water

Phloem transpots food Non-Seed Bearing Vascular Plants Can grow much taller then non-vascular plants

Grow Rhiziods (like roots) into the ground

Still make spores

Three kinds of NSBVP (NSBVP) Ferns Horse Tails Club Mosses NSBVP Evolutionary tools Cell walls to retain water and shape

Spores to spread offspring

Xylem to transport water

Phloem to transport food Non-Vascular Plant Evolutionary Tools Cell walls made of cellulose to retain water and shape

Spores to spread offspring Moss
Hornworts Ferns
Horse tails
Club moss Seed Bearing Plants As time passed plants spread all over the globe

Continued to evolve more complex and efficient ways to
-reach sunlight
-spread young The Next Evolutionary Step Still have the tools that made ferns and moss so successful but they evolved a replacement for spores: seeds

Seeds are a embryonic plant wraped in a seed coat

Played a key role in plant's domination of land Higher Plants Space Ships? Seeds are like space ships

Seed bearing plants put their young in protective shells and send them into the enviroment with all the nutrients that they need to get started

Spores on the other hand are just single cells with very little resources Types of Seed Bearing Plants There are two divisions of seed bearing plant

Angiosperms Gymnosperms (Cone Plants) Gymnosperms are all plants that make cones

They don't make flowers

Include Conifers (pine trees), Ginkgoes, Cycads, and Gnetophytes

Ginkgoes, Cycads, and Gnetophytes have been around since the time of the dinosaurs and not many species remain Conifers (Pine trees) Pine trees are by far the most successful of all the cone plants

Very common is Saskatchewan and some can survive very cold and dry conditions

Make both male and female cones, male cones make pollen and female cones make eggs Seeds increased the chances that a young plant will survive by giving it everything it needs Flowering Plants Gymnosperm Evolutionary Tools Cellulose walls
Cones to hold seeds Angiosperms Plants that create flowers

The most successful type of plant

Includes all grasses, fruit trees and anything that makes flowers Two Classes of Angiosperms Monocots

Differences between Mono and Dicots Monocots
Parallel Veins
Flowers in multiples of 3 Dicots
Net veins
Flowers in multiples of 5 Flowers attract polinators such as insects to them

This helped to create diversity amoung flowering plants because it made it easier for plants to cross pollinate Angiosperm Evolutionary Tools Cellulose in cell walls




Flowers to attract pollinators
Pine trees
Gnetophytes Maple tree
Apple tree
Rose Corn
Palm tree
Full transcript