Question

which characteristic of mitochondria and chloroplasts suggest they were once independent bacteria? they reproduce similar to bacteria. they have a cell wall made of cellulose. they are larger than all other organelles.

Explanation:

• For the option "They have a cell wall made of cellulose": Mitochondria and chloroplasts do not have cell walls made of cellulose (plant cell walls have cellulose, but these organelles don't), so this is incorrect.
• For the option "They are larger than all other organelles": Mitochondria and chloroplasts are not larger than all other organelles (e.g., the nucleus can be larger), so this is incorrect.
• For the option "They reproduce similar to bacteria": Mitochondria and chloroplasts reproduce through binary fission, which is similar to bacterial reproduction. This supports the endosymbiotic theory that they were once independent bacteria.

Answer:

A. They reproduce similar to bacteria.