One. To do it reliably is another story.
As many as you want, but just make sure you are able to take care of them all!
many cells
depends on the size of the baby seals you pull them from
There are many ways you can make a homemade baby rattle. The easiest way would be to take a bottle and fill it with dry pasta, beads, or anything that will make a noise a baby would find exciting.
Because that is what it take for the sperm to produce and make the baby grow
Cells that take nitrogen in the air and make to a form that plants can take in from the soil.
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14
I don't know but i can't get my baby to take any toys!
Take your baby to a doctor to make sure the odor is not the sign of a disease.
9 months
I took one and a half million cells (slides), all hand pointed, to make the movie 'Snow White'.