Is there more water today, or when the Earth was formed?

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement