Multiple Choice QuestionsA prokaryoticv autotrophic nitrogen-fixing symbiont is found in
Cycas
Cicer
Pisum
Pisum
The unequivocal proof of DNA as the genetic material came from the studies on a
I) The sporophyte in liverworts is more elaborate than that in mosses
II) Salvinia is heterosporous
III) The life -cycle in all seed - bearing plants is diplontic
IV) In pinus male and female cones are borne on different trees
Statements (I) and (III)
Statement (I) and (IV)
Statements (II) and (III)
Statements (II) and (III)
Selaginella and Salvinia are considered to represent a significant step towards evolution of seed habit because
female gametophyte is free and gets dispersed like seeds
female gametophyte lacks archegonia
megaspores possess endosperm and embryo surrounded by a seed coat
megaspores possess endosperm and embryo surrounded by a seed coat
The chief water conducting elements of xylem in gymnosperms are
vessels
fibres
tansfusion tissue
tansfusion tissue
Male and female gametophytes are independent and free - living in
mustard
castor
Pinus
Pinus
The scutellum observed in a grain of Wheat or maize is comparable to which part of the seed in other monocotyledons?
Cotyledon
Endosperm
Aleurone layer
Aleurone layer
A.
Cotyledon
In wheat or maize (family-Poaceae), the scutellum is thought to be a modified cotyledon or seed leaf.
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