An example of colonial alga is:

From an evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:

Which one of the following is the characteristic feature of gymnosperms?

Which of the following is incorrectly matched?

Match the plant with the kind of life cycle it exhibits: List-I (a) Spirogyra (b) Fern (c) Funaria (d) Cycas List-II (i) Dominant diploid sporophyte vascular plant, with highly reduced male or female gametophyte (ii) Dominant haploid free-living gametophyte (iii) Dominant diploid sporophyte alternating with reduced gametophyte called prothallus (iv) Dominant haploid leafy gametophyte alternating with partially dependent multicellular sporophyte

Selaginella and Salvinia are considered to represent a significant step towards the evolution of seed habit because:

Given are the following five statements (I - V) for your consideration: I: In Equisetum, the female gametophyte is retained on the parent sporophyte II: In Ginkgo, the male gametophyte is not independent III: The sporophyte in Marchantia is more developed than that in Polytrichum IV: Sexual reproduction in Volvox is isogamous V: The spores of slime moulds lack cell walls How many of the above statements is/are correct?

Match List-I with List-II: List-I A. Pteridophyte B. Bryophyte C. Angiosperm D. Gymnosperm List-II I. Salvia II. Ginkgo III. Polystrichum (Polytrichum) IV. Salvinia

A prokaryotic autotrophic nitrogen-fixing symbiont is found in: