Which statement about the immune system is false
a- t cells kill body cells as they destroy viruses
b- some pathogens attack immune system cells
c- lymph removes cell wastes and bacteria
d- most white blood cells destroy viruses

Which direction does the energy flow in this energy pyramid ?

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously

Which locations on the map are low-pressure areas? a b c d e