Why is it advisable to use tongs or test tube holder when taking a beaker off a laboratory burner?

The beaker may have heated up greatly over the process of being on the burner, and if you take it off the burner with, say, your bare hands, you run the risk of taking your hands off of it because its hot, and then drop the beaker, most likely shattering it

Explanation:

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.