1.In Ferns, at the lower surface of leaf cluster of dot like structures called--------------- are found containing spores
Answers
Answer:
sori of sporangia
Explanation:
Fern sporangia are grouped into structures called sori, which are generally dot shaped in appearance, and are most often found on the underside or around the edges of leaves.
Answer:
In ferns, at the lower surface of leaf cluster, dot-like structures are called Fern Sori and are found containing spores.
Explanation:
Sori (plural) or sorus (singular) is the group of sporangia that consist of spores. Present on the underside (lower surface) of the blade or the leaf, they vary substantially in shape, location, arrangement, and coverage depending on the type of fern. Indusia or indusium (singular) is the protective tissue that covers the young sori.
Some common types of sori are as follows-
- Sori without the protective tissue or indusia. For example- polypody ferns like rock polypody.
- Sori with its indusia formed in the shape of an umbrella. For example- In sword fern
- Sori with its indusia formed in the shape of a hood. For example- In Fragile fern.
- Sori with its indusia formed in the shape of a kidney. For example- In northern wood ferns.
Sori with linear indusia found in maidenhair spleenwort fern.