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photosynthetic forms start to form.
add oxygen to the atmosphere.
Eukaryotes
examlpe >> Algae -
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periods:
1. Ordavovician and silurian period
2. Devonian period
3. Carboniferuos and Permain period -
First land plant evolved from aquatic ancesetors.
* Simple
* Grew close to the ground in damp areas -
Some plants like ferns evovled.
adapted to dry places -
Giant Ferns and other plants formed vast swampy forests.
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periods>>
Triassic
Cretaceous -
Cone-bearing Plants called Cycads
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Leafy trees
Shrubs
Small Flowing Plants -
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Grass and flowering plants evloved
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After Ie age period
water level is high and ther is more algae then any other plants through all the periods.
most l=plants are still there that survived the ice age.