So the exam is coming soon and students are ready to prepare for their SEE exam so we will provide you with some of the important questions of Biology Science that will be going to help in your upcoming exam.
the lultivation of silk worm is called sericulture. These are two types of silk worm reared in Nepal, i.e. Eri-silkworm and seri-silkworm, etc.
Silkworm is midsized insect like butterfly having white creamy colour and 2-3 cm length. It’s body is divided into three parts:- Head, thorax and abdomen. It has pair of antina, wings and three pair of legs.
In pupa stage the silkworm produce silk fibres.
When mulberry leaves are not available then eggs can be store to kept in safe.
The hatched larva is called first instar. Five times silkworm moult in its larval stage.
The pupa stage is called cocoon. It is kept in hot water or air to obtain silk fibres because to kill pupa.
The economic importance of silk worm are:-
-Silk is use to make clothes.
-It improves economic condition of farmers.
-Intestines of silk worms are extracted to make strings (gut), etc.
The feature of silk fibres are:-
-Silk is a shining, light and durable fibre.
-It is longer and more elastic.
-It can be coloured easily, etc.
Eggs of silk worms get stuck with leaves due to they are covered by gelatinous separation.
So those were the important questions that will help you to pass the exam of Biology Science. you can check other question in our previous article