If anyone could help that would be awesome! Define an acid based on Ion concentration, pH values and real world examples.

Im is in a crowd of people at the mall looking for his girlfriend tammy, who was supposed to meet him for dinner. jim realizes tammy is across the room as he catches a whiff of her overpowering perfume, 'paris #6'. which process explains why jim is able to smell the perfume?

In a cladogram' when does a group of organisms branch off

Which of the following typically characterizes a tropical rainforests