Question

In fern, sporangia are borne on the

• A. Margin of leaf
• B. Abaxial side of leaf
• C. Adaxial side of leaf
• D. Only on the tip of leaf

Answer 1

The correct option is B Abaxial side of leaf

In ferns, sori are yellowish or brownish mass on the underside of a fertile frond. In some species, they are protected during development by a scale or film of tissue, called as the indusium, which forms an umbrella-like cover. Sori occur on the sporophyte generation, the sporangia within producing haploid meiospores. As the sporongia mature, the indusium shrivels, so that spore release is unimpeded. The sporangia then burst and release the spores.

So, the correct answer is 'Abaxial side of leaf'