NEET BIOLOGY

Detailed explanation-1: -Fern Sori. Sori (singular: sorus) are groups of sporangia (singular: sporangium), which contain spores. Sori are usually found on the underside of the blade. Young sori are commonly covered by flaps of protective tissue called indusia (singular: indusium).

Detailed explanation-2: -sorus, plural sori, in botany, brownish or yellowish cluster of spore-producing structures (sporangia) usually located on the lower surface of fern leaves.

Detailed explanation-3: -Sporangium. The reproductive structures on the underside of the frond. Each sporangium is a capsule that contains spores. They are usually aggregated into clusters called sori.

Detailed explanation-4: -The sporangia is the structure which produces spores. In ferns, the sporangia are usually aggregated into particular bigger structures.