Which of the following most likely explains why the chemical symbol for calcium is Ca? a.) The symbol C was already used for carbon.

b.) The symbol was assigned by modern alchemists.

c.) Calcium is made of more than one type of atom.

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england