"Biology Revisited" joke

When you breath, you inspire. When you do not breath, you expire.

Mushrooms always grow in damp places and so they look like umbrellas.

Thesaurus is an ancient reptile with an excellent vocabulary.

It has recently been discovered that research causes cancer in rats.

Before giving a blood transfusion, find out if the blood is affirmative or negative.

Genetics explain why you look like your father and if you don't why you should.

Dew is formed on leaves when the sun shines down on them and makes them perspire.

Sterility is hereditary: If your grandfather didn't have children and your father didn't have children, you won't have children too.

Life is a sexually transmitted disease.