Answer:
The correct option is A which is they carry out all basic life activities.
Explanation:
Bacteria are simplest organism known to exist.
This simplicity is in their structure and somehow in function also.
It does not mean they have lack of metabolism or structural features.
Instead they carry all the functions and structure which distinguish them from non living organism.
Some of these structures are:
- Genetic material.
- Cell wall.
- Cell membrane.
- Ribosomes.
Metabolism of bacteria:
- Respiration.
- Photosynthesis(not all)
- Digestion (In some ingestion)
- Defense system.
