Assertion: ovum | /r/CapableOf | accompany by special cells
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Source sentences:
text: The most common type of heterogamy is oogamy (occurring in all multicellular animals and in all higher and many lower plants) in which the egg cell is a large, usually nonmotile cell (macrogamete) often containing a store of nutrients or accompanied by special cells for the nourishing of the future embryo, and the sperms are small (microgametes) and capable of movement.