Describe the evidence that suggests that mitochondria were acquired before plastids in eukaryotic evolution.

Mitochodaria is present in majority of cells and plastid is present only in in few.

Explanation:

Endosymbiosis theory explain that mitochondria and plastids arose from bacteria through engulfing by larger cells because mitochondria and plastids contain different DNA than cell nuclei.

Mitochondria were acquired before than plastids because mitochondria is present in majority of eukaryotic cell and some cell have plastids with mitochondria.This explain that after the endosymbiosis of mitochondria some cells did endosymbiosis with photosynthetic bacteria to acquire plastid.

The fact that most  Eukaryotes  possess Mitochondrial despite  possession of plasmid, is an indication that  some eukaryotes were able to engulf some  photosynthetic bacteria,(endosymbiosis) after mitochondria endosymbiosis,This true because some early  Eukaryotes possesses  either the mitochondria, or its modified version or plastids.

Explanation:

oxygen +1 most likely