https://padlet.com/wda37187/x49zm21bj9ibahpv اللغة الانجليزية en-us 2021-11-16 13:16:05 UTC 2026-02-14 18:34:17 UTC hello@padlet.com wda37187 https://padlet.com/wda37187/x49zm21bj9ibahpv/wish/1896777711 Hi, I am George Amato, and I'm a molecular biologist. Sometimes the government calls me to help solve mysteries, like this time in 1993. One of their officers told me he had spotted some suspicious packages at Kennedy Airport in New York City. These boxes contained handbags and shoes.

By looking at the pattern on the reptile skins, the officer had a hunch they were made from Yacare caiman, a relative of the crocodile and alligator.

My blood started to boil. "But the Yacare caiman is a protected species," I said into the phone. "Bringing skins of that animal into the U.S. is against the law!"

"Exactly!" said the guy at the U.S. Fish and Wildlife Service. "That's why the officer seized the shoes and handbags from the reptile skin importer."

"So, what's the problem?" I asked.

"The importer said it was not a protected caiman," he said.
The importer claimed that it's impossible to tell the difference between caimans just by comparing skin patters. This disagreement went to court. And that's where I came to the rescue.

First, I took samples of the reptile skins to my lab at the American Museum of Natural History. Then, I made lots of copies of the the DNA, so it was easier to study. Next, I used a machine to figure out the DNA's sequence, which looks like a long string of letters. Finally, I compared this skin's sequence with other crocodilian sequences in our DNA computer library. It was a perfect match to the Yacare caiman! Those shoes and handbags were definitely made from a legally protected species.

I gave this report to the judge. Based on the DNA evidence, the judge agreed that the skins were illegal. The skins were taken away and the importer had to pay a fine. 

Source: https://www.amnh.org/explore/ology/genetics/dna-detective

]]> 2021-11-17 13:02:32 UTC https://padlet.com/wda37187/x49zm21bj9ibahpv/wish/1896777711 wda37187 https://padlet.com/wda37187/x49zm21bj9ibahpv/wish/1922562343 Instructions:
• Collect old pictures of different animals.
• Choose the body parts such as head, body, wings, legs and tail, to suit where your animal lives, its food and how it moves.
• Cut the body parts you need for your animal (ask a family member to help you).
• On a piece of paper, use the animal parts you cut to make a new animal.
• Glue the body parts in place.
• label the parts of the new animals (head, eyes... etc.).

 Write down (2-3) sentences about the new animal that you create, including the following:
Its name, where it lives and what it eats.
 Read out your sentences to a family member or a friend.]]> 2021-12-01 11:40:42 UTC https://padlet.com/wda37187/x49zm21bj9ibahpv/wish/1922562343 loloshabeed https://padlet.com/wda37187/x49zm21bj9ibahpv/wish/1925210176 عبد الله عنان واجب ...]]> 2021-12-02 14:08:04 UTC https://padlet.com/wda37187/x49zm21bj9ibahpv/wish/1925210176 https://padlet.com/wda37187/x49zm21bj9ibahpv/wish/1929785190 2021-12-05 18:17:25 UTC https://padlet.com/wda37187/x49zm21bj9ibahpv/wish/1929785190