USA HISTORY

Detailed explanation-1: -Silk is a soft, smooth cloth that has been used by humans for thousands of years. It is made of fine threads woven by silk-moth caterpillars. These tiny creatures weave the threads into cocoons to protect themselves during metamorphosis. Human beings can harvest the cocoons and extract the threads to make silk fabric.

Detailed explanation-2: -After wandering for a while, the caterpillar makes a simple silk pad on the underside of a branch or twig. It uses a hook-covered appendage called a cremaster to attach itself to this pad. It twists around, embedding its cremaster firmly in the silk. Then, it sheds its skin, revealing the chrysalis.

Detailed explanation-3: -“Peppered moth caterpillars mimic twigs to avoid being detected and eaten by birds. Because the twigs that they might find themselves on can differ in colour and pattern, they have evolved to change colour.

Detailed explanation-4: -The words cocoon and chrysalis are often used interchangeably when talking about monarchs and other butterflies. However, they are two completely different things! Cocoons are specific to moths, while chrysalises are formed by butterflies. Moths spin silk around themselves and molt inside the silk casing.