Which statements are true of all scientific endeavors? O All scientific endeavors are time-consuming.

O All scientific endeavors cost a lot of money.

O All scientific endeavors are supported by evidence.

O All scientific endeavors result in the support of a hypothesis.

The rate at which molecules water and oxygen can enter a cell is determined by the-

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).

Which type of transport is responsible for oxygen entering into blood cells? a. vesicle b.passive c. facilitated d.active b.passive