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Adapting to Life on Land

"Plants evolved about a billion years ago, but before that, the land was bare. The ocean water contained bacteria, algae and many simple animals like corals, sponges, jellyfish and worms. Scientists believe that algae at the edges of the inland seas and oceans adapted to life on land." Glencoe Reading Essentials


The vocabulary you must understand for this unit is:
Cuticle
Leaf
Nonvascular plant
Root
Seed
Stem
Vascular plant
Vascular tissue
Chloroplast
Mitochondria
Biogenesis

So, if land plants evolved from life in the oceans, where did the life in the oceans come from?

Lets step back a few billion years to find out how scientists eukaryotes were formed. The Theory is called Endosymbiosis, and we have LOTS of indirect evidence to support it. Remember, a scientific theory is considered a valid explaination for why something happened in science and always has evidence to support it.


This gets us wondering , where did the prokaryotes come from? To answer this question we must take one more giant leap backward.



Ready for a quiz? Study this!
1. The theory of Endosymbiosis and what organelles are directly involved
2. What coacervates are and what they are NOT
3. What makes up primordial soup
Here is your Study Guide

Ready for a test? Study the following material:
1. Vocabulary
2. How Plants Adapted to life on Land
3. Plant Organs
4. Special Adapations of plant organs
5. Leaf Structure

Here is your Study Guide