Answer :
Branching points at the root of the eukaryotic phylogenetic tree suggest that Archaeplastids were the first eukaryotes
What is Archaeplastids ?
The photoautotrophic red algae (Rhodophyta), green algae, land plants, and the smaller group glaucophytes are all members of the Archaeplastida, a large group of eukaryotes. Additionally, it likely contains the microscopic picozoans as well as the non-photosynthetic lineage Rhodelphidia, a eukaryotrophic predatorial flagellate that is a sister group to the Rhodophyta.
The presence of two membranes surrounding the chloroplasts in the Archaeplastida suggests that they were acquired by a single endosymbiotic event while feeding on a cyanobacterium. With the exception of the amoeboid genus Paulinella, all other organisms that possess chloroplasts have three or four membranes surrounding the chloroplast, indicating that they were derived secondary from red or green algae. Glaucophytes have never been a part of secondary endosymbiosis processes, in contrast to red and green algae.
The majority of the time, the cells of the Archaeplastida lack centrioles and have mitochondria.
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