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what does unequal division ensure?

Explanation:

The egg cells divide meiotically to form polar body and ovum, Their is an unequal division which ensures that large amount of cytoplasm goes in ovum because ovum will undergo many division after fertilisation to form embryo. So unequal division ensures that there is enough cytoplasm for embryonic cells at initial stages of embryonic development

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.