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Correct Mitochondria and chloroplasts evolved separately, each from a common ancestor

Biology Jan 12, 2021

Correct Mitochondria and chloroplasts evolved separately, each from a common ancestor. Cells with mitochondria arose first through a single endosymbiosis event. The cell that first acquired mitochondria through endosymbiosis is the common ancestor of all the eukaryotic species on the phylogenetic tree. Cells with both chloroplasts and mitochondria arose later, some cells acquired chloroplasts by secondary endosymbiosis (shown by the green and red lines on the phylogenetic tree). Part C Now use the phylogenetic tree to determine which statements about secondary endosymbiosis are true Select a that apply. Some organisms on the phylogenetic tree acquired mitochondria through secondary endosymbiosis. Core Cercoza and Euglenozoa ocations indicated by the red arrows) acquired their chloroplasts by secondary endosymbiosis from green algae. Some organisms on the phylogenetic tree acquired chloroplasts through secondary endosymbiosis. The chloroplasts of green algae and glaucophytes are more similar than the chloroplasts of green algae and red algae. (The locations of these organisms are indicated by the purple arrows.)

Expert Solution

* Core Cercoza and Euglenozoa acquired their chloroplasts by secondary emdosymbiosis from green algae.

* Some organisms on the phylogenetic tree acquired chloroplasts through secondary endosymbiosis.

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