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Different cultures have radically different expectations about public speaking.
Vitelline Envelope
The Vitelline Envelope is a protective layer that surrounds the plasma membrane of ovum (egg cells), particularly in invertebrates, involved in fertilization.
Jelly Coat
One of the acellular coverings of the eggs of certain animals, such as echinoderms.
Sea Urchin Egg
The reproductive cell from which a sea urchin develops, often used in developmental biology research.
Holoblastic Cleavage
A cleavage pattern in which the entire embryo cleaves; characteristic of eggs with little or moderate yolk (isolecithal or moderately telolecithal) (e.g., the eggs of echinoderms, amphioxus, and mammals). Compare with meroblastic cleavage.
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