Which of these statements are both true and support the endosymbiosis theory? Se

Question

Which of these statements are both true and support the endosymbiosis theory? Select all that apply. Organelle DNA packaging is similar to nuclear DNA packaging. Mitochondrial genes are transcribed by a polymerase that is similar to bacterial polymerases. Most mitochondrial genes are transcribed unidirectionally. Mitochondria are similar in size to some existing bacteria. Organelle DNA packaging is similar to the packaging of a bacterial chromosome. Many mitochondrial genes are polycistronic. This phylogenetic tree shows the evolutionary history of eukaryotic organisms that contain mitochondria and chloroplasts. Use the tree to determine which statements regarding the origins of these organelles are true. Select all that apply. Only species in Plantae have chloroplasts. All chloroplasts descended from a common ancestor. The acquisition of mitochondria occurred after the acquisition of chloroplasts. All mitochondria descended from a common ancestor.

Explanation / Answer

Part A

Statements that support endosymbiotic theory are

Organelle DNA packaging is similar to nuclear DNA packaging

Mitochondrial genes are transcribed by a polymerase that is similar to bacterial polymerases

Mitochondria are similar in size to some existing bacteria

Organelle DNA packaging is similar to the packaging of a bacterial chromosome

Part B

All chloroplasts descended from a common ancestor

All mitochondria descended from a common ancestor

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