Answer:
Bacteria are the small microscopic organism that lack the membrane bound organelle and nucleus is not present in the bacteria. Bacteria are harmful as well as pathogenic for the human life.
Beneficial bacteria that are present in the soil help the gardeners to grow plants well. Bacteria has the ability to extract the important metals that are present in the soil and makes them available to the plants. Sme bacteria increases the soil fertiity. Bacteria may fix the nitrogen present in the soil and make them available to the plants.