When a sea urchin egg is removed from the
ocean and placed in freshwater, the egg
swells and bursts. which of these causes
water to enter the egg?
a) coagulation
b) sodium pump
c) active transport
d) osmosis

Hemoglobin is the compound in red blood cells that carries oxygen to the body. the distribution of hemoglobin in women in g/dl of blood is approximately normally distributed with mean 14 and standard deviation 1. too little hemoglobin, and you're anemic. 2. too much, and (unless you live at high altitudes), you can have other problems.

The shift of a vehicle's weight around its center of gravity is known as

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna