NTA Abhyas NEET2020BotanyPlant KingdomPractice
The term protonema is related to some plants, which is :
Options
- Adiploid and is found in liverworts
- Bdiploid and is found in pteridophytes
- Chaploid and is found in mosses
- Dhaploid and is found in pteridophytes
Correct answer
C. haploid and is found in mosses
Step-by-step solution
Protonema is a haploid structure found in some bryophytes (like mosses). In bryophytes after meiosis of spore mother cell, haploid spores are formed. These spores form gametophyte in which two stages are there ( a ) protonema ( b ) leafy stage. Protonema is developed directly from a spore, and this protonema is creeping, green branched and frequently filamentous stage.