Alga's are the oldest known plants/protists on earth, the earliest recording goes back over 900 million years. Alga's do not have real roots, stems or leaves like land plants do.
There are different types of phylum's of alga's, but there are three main categories:
- Brown algae
- Green algae -> have spores, are one celled, the reproductive unit is capable of giving rise to a new individual cell without sexual fusion
- Red algae
We are looking at green algae:
- Green algae has a noticeable pigmentation that is green chlorophyll which captures light energy for food making process.
- uni-cellar ( 1st step)
- colonies (2nd step)
- multi-cellular (3rd step) from this step onwards you can extract oil.
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