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Explain the function of each of the foll...

Explain the function of each of the following :
(a) Coleorihiza , ( b) Umbilical cord ,( c) Germ pores

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Coleorhiza- Protects the radicle of monocot embryo.
Umbilical cord: It develops from two separate fetal origins. The yolk sack and the allantosis both comprise the umbilical cord. It helps in transport of substances to and from the embroyo .
Germs Pores: The outer wall of polllen grain through which the germ tube or embryo tube makes its exitis on Germination.
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