Related InterviewSolutions

• Which of the following is not a heterosporous genera of pteridophytes ?A. SelaginellaB. IsoetesC. MarsileaD. None of these
• Antheridium of pteridophytes possess a jacket ofA. 3 cellsB. 4 cellsC. 6 cellsD. 1 cell
• Actinostele is not present inA. PsilotumB. Lycopodium serratumC. SelaginellaD. Asteroxylon
• Antherozoids of Dryopteris areA. non-flagellatedB. spirally - coiledC. minuteD. irregularly coiled
• Antherozoids of Dryopteris areA. multiciliated and coiledB. multiciliated and sickle- shapedC. biciliated and coiledD. biciliated and sickle- shaped
• Gametophyte of pteridophyte isA. short-lived, free - living and sexual organ bearingB. heart-shaped, dependent on sporophyte and sex-organ bearingC. fibre-like and dependent on sporophyteD. semiparasite on sporophyte
• Evolution of seed habit first started inA. thalloid bryophytesB. Psilotum like ancestral pteridophytesC. gymnospermsD. mosses
• Seed habit is linked toA. homosporyB. heterosporyC. parthenogenesisD. parthenocarpy
• The gametophyte of pteridophyte grows in damp, moist and shady places becauseA. they are limited and restricted to a narrow geographical regionB. they need water for fertilisation of gametesC. water is required for gamete formationD. egg cell swims in water to reach to the antheridia
• Selaginella a pteridophyte shows some advances towards the seed habit. Consider the following statement. I. Development and retention of embryo inside megasporangium. II. Homospory. III. Formation of serveral megaspores within a megasporangium . IV. Enhancement in the size of male gametophyte. Choose the incorrect statements with regard to prerequisites for seed habit .A. I and IIIB. I and IVC. II, III and IVD. None of these