Question

answer bank
divergence of early eukaryotes occurred
undigested bacteria evolved into chloroplasts.
host cell ingested cyanobacteria.
undigested bacteria evolved into mitochondria.
host cell ingested aerobic bacteria.

Explanation:

This diagram illustrates the endosymbiotic theory, which explains the origin of eukaryotic organelles.

1. First, a host cell ingests aerobic bacteria, which evolve into mitochondria.
2. Next, a host cell with mitochondria ingests cyanobacteria, which evolve into chloroplasts.
3. Finally, the divergence of early eukaryotes leads to distinct eukaryotic lineages.

Answer:

• Box connected to the cell with orange organelle (after "Host cell ingested aerobic bacteria."): Undigested bacteria evolved into mitochondria.
• Box connected to the cell with both orange and green organelles (from the cell with orange organelle): Host cell ingested cyanobacteria.
• Box connected to the cell with both orange and green organelles (leading to the top right cell): Undigested bacteria evolved into chloroplasts.
• Box connected to the bottom right cell: Divergence of early eukaryotes occurred.