According to scientific thought when does one species of organisms become two species

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

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

Draw the farm's ppf for corn and beef. draw a point that shows an inefficient combination of corn and beef. label ita. draw a point that shows an unattainable combination of corn and beef. label itb. draw a point that shows an efficient combination of corn and beef. label itc.