Viewing each individual and counting all the members of a population is direct observation
indirect observation

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

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).

Aperson with age is more likely to catch diseases that healthy people usually don’t catch. what are these infections called?