the small blue circles in the figure just inside the oocyte membrane represent vesicles containing calcium ions that are spilled into the extracellular space to prevent polyspermy. when does this take place?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years