Botany - Plant Kingdom Question with Solution | TestHub
Read the following five statements (A - E) and answer as asked next to them.
(A) InEquisetum, the female gametophyte is retained on the parent sporophyte.
(B) InGinkgo, male gametophyte is not independent.
(C) The sporophyte inRicciais more developed than that inPolytrichum.
(D) Sexual reproduction inVolvoxis isogamous.
(E) The spores of slime moulds lack cell wall.
Options:
Answer:
Solution:
Equisetumis a pteridophyte and in pteridophytes, the main plant body is sporophyte which is differentiated into true root, stem and leaves. Gametophytes are small or inconspicuous and free living, mostly photosynthetic thalloid called prothallus.
Ricciais a liverwort andPolytrichumis a moss. The sporophyte in mosses is more elaborate than that in liverworts.
Volvoxshows anisogamous fusion i.e., fusion between one large, non motile (static) female gamete and a smaller, motile male gamete.
During unfavourable conditions, the slime mould diferrentiates and forms fruiting bodies bearing spores at their tips. The spores possess true walls. They are extremely resistant and survive for many years, even under adverse conditions.
