Question

Silkworm feeds on
(a)Mango leaves
(b)Apple leaves
(c)Grape leaves
(d)None of the above

Answer 1

Hint: Domestic silkworms are an insect from the moth family Bombycidae. They are closely similar to Bombyx Mandarina, the wild silk moth. The larva or caterpillar of a silk moth is the silkworm. It is a commercially vital insect, being a primary producer of silk.

Complete answer:
The life cycle of a silk moth begins when a female silk moth gives eggs. The caterpillars (or larvae) are concluded from the eggs of the silk moth. The silkworms prey on mulberry leaves and provide a rise to pupa. In the pupa stage, a weave is netted around by the silkworm to carry itself. After that it swings its head, spinning a fiber made from protein and becoming a silk fiber. Several caterpillars form a protective layer around the pupa and this covering is understood because of the cocoon. The silk thread is produced by the silk moth’s cocoon.

Additional Information: In sericulture, the silkworm rearing process begins with the laying of eggs by the feminine silk moth. Generally, 300-500 eggs are produced from one female silk moth. These eggs are then sterilized with the assistance of a 2 percent formalin solution.
A feeding bed is ready on a rearing tray by sprinkling chopped mulberry leaves onto it. The hatched larvae are transferred into this tray via a process referred to as brushing. In order to continue to balance humidity, foam strips are absorbed in water and placed on the tray.
The silkworm larvae initially have a good appetite. As they grow, their hunger steadily decreases until their active stage. At this stage, the silkworm feeds vigorously up to its final feeding stage.
After reaching maturity, the larvae begin checking out hospitable places to start their pupation. At this stage, the body of the silkworm decreases and develops into translucent. These mature larvae now wrap themselves during a cocoon by secreting saliva from the 2 salivary glands on their heads. This saliva solidifies and becomes silk when it comes in contact with air.
So, the correct answer is ‘None of the above’.

Note: Silk was discovered around 3500 BC in China. Technological advancement and new growth have authorized manufacturers to give various types of silk from different silkworms on the support of luster and texture. Mulberry silk is the commonest silk moth that's used for producing silk. Rearing of the silkworm is known as sericulture.