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Algal zone is present in
normal root of Cycas
coralloid root of Cycas
normal root of Pinus
stem of Cycas
B.
coralloid root of Cycas
The cortex in coralloid roots of Cycas is divided into inner and outer regions by algal zone. The cells of this zone contain endophytic algal forms particularly Anabaena cycadeae and Nostoc punctiforme.
Both gymnosperms and angiosperms bear seeds, then why are they classified separately?
What is heterospory? Briefly comment on its significance. Give two examples.
Explain briefly the following terms with suitable examples:
(i) protonema
(ii) antheridium
(iii) archegonium
(iv) diplontic
(v) sporophyll
(vi) isogamy
Differentiate between the following:
Red algae and brown algae
Differentiate between the following:
liverworts and moss
Differentiate between the following:
homosporous and heterosporous pteridophyte
Differentiate between the following:
syngamy and triple fusion
How would you distinguish monocots from dicots?
Describe the important characteristics of gymnosperms.
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