Question

which evidence shows that the endosymbiotic relationship with mitochondria happened before the relationship with chloroplasts? chloroplasts are found in all animal and plant cells. mitochondria are found in all animal and plant cells. chloroplasts or mitochondria are not found in any cells.

Explanation:

To determine the evidence for the endosymbiotic order, we analyze each option:

• Option 1: Chloroplasts are not in animal cells (only plant/algal cells), so this is false.
• Option 2: Mitochondria are in all animal and plant cells (animal cells lack chloroplasts, plant cells have both). This shows mitochondria’s endosymbiosis occurred earlier (since it’s universal across eukaryotes, while chloroplasts are limited to photosynthetic eukaryotes).
• Option 3: Both organelles are found in relevant cells, so this is false.

Answer:

B. Mitochondria are found in all animal and plant cells.