The absolute number of molecules of drug required to elicit a response
Answer:
First, the last picture
second, the third picture
third, the second or first (the picture is blurr so i dunno)
then the last is, the fourth.
sorry if wrong.
Introduced species can harm our planet because in some regions of the world we are not prepared for their type of species, which can all in all cause damage.
It takes 27 days for the moon to orbit the earth
