Certain free living bacteria in the soil like (P) …………… and (Q) …………… use the free nitrogen of the soil and convert it to ammonia with hydrogen. P and Q are :

1. P — Rhizobium, Q — Azobacter
2. P — Azobacter, Q — Clostridium
3. P — Clostridium, Q — Rhizobium
4. P — Nitrosomonas, Q — Nitrobacter

Assertion (A): Bacteria are the smallest living organisms on the earth with a well-defined nucleus.

Reason (R): The single chromosome of a bacterial cell is enclosed in a nuclear membrane.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Assertion (A): Clostridium is a type of bacteria found in the root nodules of leguminous plants. It converts soil nitrates into atmospheric nitrogen.

Reason (R): Clostridium is a free-living bacteria in the soil which converts soil nitrates into ammonia.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Assertion (A) : Fungi are non-chlorophyllous, saprotrophic plants which can be unicellular or multicellular.

Reason (R): Some fungi are autotrophic. They contain chlorophyll and prepare their own food.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.