9. Draw the life cycle of a silk moth and answer the following questions:
(a) In which stage does the silk moth feed on the plant leaves?
(b) In which stage is the cocoon formed?
(c) How is cocoon formed?
(d) What happens to the caterpillar inside the cocoon?
TO
Answers
Answer:
(a) The silk worms undergo moulting (ecdysis) four times and the stages in between the mountings are called instars. There are 5 instars in the larval stage of silk moth. The first instar larva can feed only on tender leaves of mulberry as it is at a very young stage. The first instar larva feeds continuously and grows rapidly.
(b) In the life cycle of moths and butterflies, the cocoon or chrysalis is formed during the series of changes called metamorphosis. Like many other insects, butterflies and moths go through four stages of metamorphosis: egg, larva, pupa, and adult. The cocoon or chrysalis houses the insect during its pupal, or resting, stage of development.
(c) a cocoon is formed by the worm which eats mulberry leaves and after eating it forms a cocoon
(d) What happens inside a chrysalis or cocoon? First, the caterpillar digests itself, releasing enzymes to dissolve all of its tissues. If you were to cut open a cocoon or chrysalis at just the right ...
