Identify the incorrect statement regarding true bacteria?

1. As a group, they exhibit maximum metabolic diversity

2. Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur.

3. Heterotrophic bacteria are the most abundant in nature.

4. Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores.

Which statement is correct for bacterial transduction?

1. Transfer of some genes from one bacteria to another bacteria through virus

2. Transfer of genes from one bacteria to other bacteria by conjugation

3. Bacteria obtain DNA directly

4. Bacteria obtain DNA from other external sources.