Description : Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms. (a) Perianth and two integuments (b) Embryo development and ... of resin duct and leaf venation (d) Presence of vessel elements and absence of archegonia
Last Answer : (d) Presence of vessel elements and absence of archegonia
Description : The fused bracts in the male flowers of Gnetum are comparable to ....... a) leaves of angiosperms b) bracteoles of angiosperms c) bracts of angiosperms d) perianth of angiosperms
Last Answer : b) bracteoles of angiosperms
Description : What are the modifications of bracts, bracteoles and perianth lobes in a compound spike.
Last Answer : Ans: In compound spike, bracts are modified into sterile Glumes and fertile Lemma, Bracteoles as palea, and perianth lobes as Lodicules.