History of Alga

	Revision 6 . . (edit) November 3, 2001 1:54 pm by Josh Grosse
	Revision 4 . . November 3, 2001 1:51 pm by Josh Grosse [...and removing some of the stuff which is not quite true (e.g. no cellulose, classified mainly on pigmentation)]
	Revision 3 . . (edit) April 1, 2001 9:17 am by Josh Grosse

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Difference (from prior major revision) (minor diff, author diff)

Changed: 3c3

A few algae are prokaryotic, and belong among the bacteria. The most notably of these are the blue-green algae, or cyanobacteria?. The Prochlorophyta? are similar but have different pigmentation.

A few algae are prokaryotic, and belong among the bacteria. The most notably of these are the blue-green algae, or cyanobacteria?. The Prochlorophyta? are similar but have different pigmentation. These are among the first living things in the fossil record, dating back to c. 3800 million years ago.

Changed: 12c12

In three lines - the brown algae (Phaeophyta?), red algae (Rhodophyta?), and green algae - even higher levels of organization have developed, leading to organisms with tissue differentiation, and the case of the last to land plants.

In three lines - the brown algae (Phaeophyta?), red algae (Rhodophyta?), and green algae - even higher levels of organization have developed, leading to organisms with tissue differentiation, and the case of the last to land plants. None of them have sex organs that have protective cell layers, though, as land plants do. The largest algae belong here, among the brown algae, which may reach 70 m in length.

Added: 22a23,24

The study of algae is called phycology?.