A substance tht is formed from atoms with a characteristic set of physical and chemical properties is called?

What happens when a magniseum ion ia atracked to a chlrene ion

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).

How does natural selection change thephenotypes within a population over time?