Tuesday, January 27, 2009

Experimentation with Gradual Selection

Inspired by Richard Dawkin's video on the net about Gradual evolution (Check out the entire lecture "Growing in the Universe" on YouTube: The links: Click Here Just go on exploring the other lectures), I for once carried out a very interesting experiment on the Class 7 students of Jnana Prabodhini Prashala.
The Experiment runs as follows:
1. I first decided a ten-lettered word "PRABODHINI".
2. Each student gets any random book from his sack (much better if taken randomly)
3. Then he opens a notebook and writes the letter he observes in the left corner of blindly opened book in front of him and writes in his notebook.
4. Since I was conducting the experiment with a pre-determined word, I asked each student to write only 10 letters in a row.
5. Eleventh letter would be the first letter of 2nd "word".
6. I asked the students to prepare such fifteen sequences.
7. Then I went serially asking each student to read the sequence with number congruent to his number in the class modulo 15. (That is, 1st student would read 1st sequence, 2nd student the 2nd, and so on, and again 16th student would read 1st sequence")
8. Nowhere even couple of alphabets got together that were identical to my word.
9. As students called out the sequence, I would see my word and check it. If and only if the right letter would come in right place, then only I would make a tickmark.
10. Sample sequences were toooooooo unmatching with the word "PRABODHINI"
11. But, within One iteration of class consisting 38 students 7 letters of word "PRABODHINI" were there in the right place.
12. Second iteration did not take any long. Also, a point to be noted was that some letters such as "I"(in the 8th place) came four - five times in the right place.

Students were surprised to see the word coming off so quickly. Then I could discuss with them about Randomness and "Selection". They could understand that if simply one word could form in one-two iterations, then many such 10-lettered words could have formed easily. This essentially means that the best combination that got closer to the purpose of doing some work got "Selected".
I of course fo not propose that they have understood the "Selection Forces" and other such concepts fully. But I have prepared for myself a ground on which I can make them play and discover the processes of Evolution themselves.
I myself learned that such things are easily provable and it increased my respect for fact of Evolution. It strengthened me to accept even bizarre facts of life that resulted in a cover of magazine "Chhatra Prabodhan" that states the problems evolutionary biologists face today, prepared for the February issue of Chhatra Prabodhan dedicated to Charles Darwin as 12th February 2009 is his 200th birthday!!!

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