Group 2:  Archaepastida

The chloroplast envelope is made up of two membranes that wrap around the chloroplasts of eukaryotic algae. The three phyla that make up this group are:

• Glaucophyta – Glaucophyta is a small group of freshwater algae with only one cell. A modified endosymbiotic cyanobacterium can do photosynthesis.
• Rhodophyta – Rhodophyta is a group of red algae with more than 7,000 species that have been named. Rhodophyta’s photosynthetic pigments are all put together in phycobilisomes. Rhodophyta is one of the oldest groups of eukaryotic algae compared to some of the others.
• Chlorophyta – Chlorophyta are green algae that have both chlorophyll a and chlorophyll b. In some books, people in this group are called “seaweed.”