Question

When the gametophyte is not formed by spores but by any other part of sporophyte, it is known as

• A. polyspory
• B. multispory
• C. germination
• D. apospory

Answer 1

The correct option is D

apospory

The correct option is D.

Explanation of the correct option:

1. When the development of the gametophyte occurs from the non-reproductive cells or vegetative cells without spore formation and meiosis, it is known as apospory.
2. In apospory, the development of diploid (2n) gametophyte from vegetative cells or non-reproductive cells takes place.
3. Example: Crytomium falcatum.

Explanation of the incorrect options:

Option A:

1. When more than four pollen grains are arranged in a tetrad it is known as polyspory.
2. Example: Calotropis procera .

Option B:

No such phenomenon of multispory exists.

Option C:

1. The development of a spore or a seed into a seedling is known as germination.
2. Example: Angiosperms or gymnosperms.

Final answer: When the gametophyte is not formed by spores but by any other part of sporophyte, it is known as apospory.