E. Answer the following questions. 1. How does a silk moth weave a cocoon? 2. How is honey collected from a beehive? 3. What is lac? State its four uses. 4. How do houseflies spread diseases?
Answers
E. Answer the following questions. 1. How does a silk moth weave a cocoon? 2. How is honey collected from a beehive? 3. What is lac? State its four uses. 4. How do houseflies spread diseases?
Answer:
A-1
It is made of fine threads woven by silk-mothcaterpillars. These tiny creaturesweave the threads into cocoons to protect themselves during metamorphosis. Human beings can harvest the cocoons and extract the threads to make silk fabric
A-2
Beekeepers harvest it by collecting the honeycomb frames and scraping off the wax cap that bees make to seal off honey in each cell. Once the caps are removed, the frames are placed in an extractor, a centrifuge that spins the frames, forcing honey out of the comb.
A-3
Uses. The use of lac dye goes back to ancient times. It was used in ancient India and neighbouring areas as wood finish, skin cosmetic and dye for wool and silk. In China, it is a traditional dye for leather goods
A-4
The common housefly can transmit the pathogens that cause shigellosis, typhoid fever, E. coli, and cholera. The disease-causing agents can either be transmitted by the body hairs or by the tarsi which are transmitted to food or surfaces when the fly lands