144) What is P and Q in the given diagram respectively : [August - 2020] P = = = (A) P = Antheridiophore Q = Archegoniophore (BY P Antheridium Q = Oogonium HO P = Oogonium Q = Antheridium (D) P = Archegoniophore Q = Antheridiophore = = D) n
Answers
Answer:
(Correct option is D)
Explanation:
An upright structure consisting of a stalk and cap that bears the archegonia in certain liverworts is Archegoniophore.
The haploid thalli (single thallus) are dioecious: they produce either female archegoniophores or male antheridiophore.
In Marchantia, asexual reproduction occurs by means of fragmentation of the thallus or via gemmae produced from cells of gemma cups. In liverworts such as Marchantia, the flattened plant body or thallus is a haploid gametophyte with gemma cups scattered about its upper surface.
Rhizoid is a filamentous outgrowth or root hair on the underside of the thallus in some lower plants, especially mosses and liverworts, serving both to anchor the plant and to conduct water.
Hence, the correct options giving all the four parts (a, b, c, d) correctly identified are A - Archegoniophore, B - Female thallus, C - Gemma cup, D - Rhizoids.
So, the correct answer is 'A - Archegoniophore, B - Female thallus, C - Gemma cup, D - Rhizoids'.