Prothallus is the gametophytic stage of pteridophytes.
It is a thalloid structure and there is no distinction of roots, stems and leaves.
It is attached to the substratum with the help of multicellular rhizoids.
It produces male and female gametes which fuse to form a zygote. The diploid zygote develops into sporophyte which produces spores that germinate into haploid gametophyte.
It has vascular system consisting of tracheary elements i.e. tracheids and vessels.
So, the correct answer is 'The presence of tracheids'.
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Similar Questions
Q1
In Pteridophytes, prothallus shows
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Q2
Choose the correct statements: A. Companion cells and sieve tubes are absent in pteridophytes. B. Gametophyte of pteridophytes require cool, dry and shady places to grow. C. Prothallus is found in Dryopteris.
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Q3
In pteridophytes prothallus produces-
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Q4
In pteridophytes, prothallus produces __________________.