Read the following five statements and answer as asked next to them [AIPMT (M) 2012] |
I. In Equisetum the female gametophyte is retained on the parent sporophyte. |
II. In Ginkgo male gametophyte is not independent. |
III. The sporophyte in Riccia, is more developed than that in Polytrichum. |
IV. Sexual reproduction in Volvox is isogamous. |
V. The spores of slime molds lack cell walls. How many of the above statements are correct? [AIPMT (M) 2012] |
A) Two
B) Three
C) Four
D) None of these
Correct Answer: D
Solution :
[d] The spore of Equisetum germinate shortly after shedding and gives rise to form prothallus. |
Prothalli of Equisetum are basically monoecious and the gametophytes are rarely seen. |
The simplest known sporophyte among bryophytes is that of Riccia while highest eyolved known is Bryopsida (Polytrichum, Pdgonatum). |
Sexual reproduction in Volvox is oogamous type. |
The spores in slime molds (e.g., Physarum) are haploid, unicellular, usually globose with smooth, spiny or reticulately thickened cell walls. |
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