(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.
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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