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Regarding Gymnosperms: Match the following and choose the most appropriate option:

A. coralloid roots 1. compound
B. mycorrhiza 2. Cyanobacteria
C. leaves 3. fungal association
4. N2- fixing
5. simple

( A ) A-1,3; B-1,4; C-5
( B ) A-4; B-1,3; C-1,5
( C ) A-2,4; B-3; C-1,5
( D ) A-1,3; B-1,2,4; C-5

1 Answer

(C) is the right answer.

In gymnosperms : Roots in some genera have fungal association in the form of mycorrhiza (Pinus), while in some others (Cycas) small specialised roots called coralloid roots are associated with N2- fixing cyanobacteria. The stems are unbranched (Cycas) or branched (Pinus, Cedrus). The leaves may be simple or compound. In Cycas the pinnate leaves persist for a few years.
answered Apr 2, 2014 by pady_1