Jokes for biologists

A boy was assigned a paper on childbirth and asked his mother, "How was I born?"
"Well honey..." said the slightly prudish mother, "the stork brought you to us."
"Oh," said the boy, "and how did you and daddy get born?"
"Oh, the stork brought us too."
"Well how were grandpa and grandma born?" the boy persisted.
"Well darling, the stork brought them too!" said the mother, by now starting to squirm a little.
Several days later, the boy handed in his paper to the teacher who read with confusion the opening sentence: "This report has been very difficult to write due to the fact that there hasn't been a natural childbirth in my family for three generations."

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A biologist was interested in studying how far bullfrogs can jump. He brought a bullfrog into his laboratory, set it down, and commanded, "Jump, frog, jump!"
The frog jumped across the room.
The biologist measured the distance, then noted in his journal, "Frog with four legs jumped eight feet."
Then he cut the frog's front legs off. Again he ordered, "Jump, frog, jump!"
The frog struggled a moment, then jumped a few feet.
After measuring the distance, the biologist noted in his journal, "Frog with two legs jumped three feet."
Next, the biologist cut off the frog's back legs. Once more, he shouted, "Jump, frog, jump!"
The frog just lay there.
"Jump, frog, jump!" the biologist repeated.
Nothing.
The biologist noted in his journal, "Frog with no legs - lost its hearing."