Biology exam

Students in a Biology class were taking their mid-term exam. 

The last question was, 'Name seven advantages of Mother's Milk. It was worth 70 points or none at all. 

 

One student just couldn't think of seven reasons. But, keen to pass, he wrote:

     1) It is perfect for the baby.

     2) It provides the baby with immunity against diseases.

     3) It is always the right temperature for the baby to drink.

     4) It costs nothing.

     5) It helps to bond mother and child.

     6) It is always available when needed.

        

And then the student was stuck. In desperation, just before the bell rang for the end of the test, he wrote:

     7) It comes in two attractive containers and it's high enough off the ground where the cat can't get it.

     He got an A.