Read the following five statements (I to V) and select the option with all correct statements.
I Mosses and lichens are the first organisms to colonise a bare rock.
II .Selaginella is a homosporous pteridophyte.
III. Coralloid roots in Cycas have VAM.
IV. Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.
V. In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.
I, III and IV
II, III and IV
I, IV and V
I, IV and V
C.
I, IV and V
I, IV and V are correct statements.
II. Selaginella species are creeping or ascendant plants and produce heterospores (megaspores and microspores).
III. Caralloid roots are developed in Cycas. It produces as cluster at base of stem. It is dichotomously branched and greenish brown in colour. It contains algal zone in the cortex. This algal zone contains Nostoc and Anabaena.
A prokaryoticv autotrophic nitrogen-fixing symbiont is found in
Cycas
Cicer
Pisum
Pisum
Gymnosperms are also called soft wood spermatophytes because they lack
cambium
phloem fibres
thick-walled tracheids
thick-walled tracheids
The second stage of hydrosere is occupied by plants like
Azolla
Typha
Salix
Salix
Read the following five statements and answer as asked to them
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 the above statements are correct?
Two
Three
Four
Four
