Evolution of Eukaryotes Quiz

Which domain of life shares the most recent common ancestor with eukaryotic nuclear rRNA genes?

• Bacteria

• Archaea

• Mitochondria

• Viruses

Based on rRNA phylogeny, mitochondrial rRNA genes share the closest evolutionary relationship with which of the following?

• Eukaryotic nuclear rRNA genes

• Archaeal rRNA genes

• Bacterial rRNA genes

• Chloroplast rRNA genes

Which endosymbiotic event occurred first in the evolution of eukaryotes, and what evidence supports this?

• Mitochondrial endosymbiosis; all eukaryotes have mitochondria or mitochondrial remnants

• Chloroplast endosymbiosis; plants and algae depend on photosynthesis

• Both events occurred simultaneously; eukaryotic cells needed both organelles at the same time

• Chloroplast endosymbiosis; chloroplasts provide energy, which allowed mitochondria to evolve

Which of the following provides evidence that mitochondria originated through endosymbiosis?

• Mitochondria have their own DNA, similar to bacterial genomes

• Mitochondria are surrounded by a single membrane, like the nucleus

• Mitochondria divide by binary fission, like bacteria

• Mitochondria can survive independently outside of eukaryotic cells

Which kingdom shares the most recent common ancestor with Animals?

• Plants

• Fungi

• Protists

• Bacteria