Q. 11

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Answer :

(i) Funiculus is the stalk that attaches ovule to the placenta in the ovary

(ii) Integuments are the outer layers which surrounds ovule and provide protection to the developing embryo.


(iii) A mature embryo sac contains the following cells: antipodal cells, central egg cell, and two polar nuclei.


OR


The different parts of typical dicotyledonous embryo are:


Plumule- is the embryonic shoot, it appears as a bud which gives rise to shoot and the remaining structure in the plant.


Cotyledons- contains high quantities of starch and will provide a source of food for the developing embryo prior to germination.


Radicle- is the embryonic root, which will develop into the primary root of the plant. Allows the seed to suck up water and send out its leaves to start photosynthesis


Seed coat- protects the seed from physical, temperature and water damage.


Hilum- is a scar left by the stalk which attached the ovule to the ovary wall before it became seed.


Micropyle- is a minute pore in tesla, and it permits water to enter the embryo before active germination.



Dig: Dicot seed


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