Advanced Biology Class Exam

The last question on the test was:

'Name seven advantages of Mother's Milk' worth 70 points or none at all.

One student, in particular, was hard up to think of seven advantages.

So he wrote:

1.) It is a perfect formula for the child.
2.) It provides immunity against several diseases.
3.) It is always the right temperature.
4.) It is inexpensive.
5.) It bonds the child to mother, and vice versa.
6.) It is always available as needed.

And then, the student was stuck Finally, in desperation, just before the bell indicating the end of the test rang, he wrote...

7.) It comes in 2 attractive containers.