Development of Silk Moth

Q.

Explain the life cycle of the silk moth.

Q.

The silkworm is (a) a caterpillar, (b) a larva. Choose the correct option.

1. a caterpillar

2. a larva

3. Both a and b

4. Neither a or b

Q.

The process in which caterpillars turn into butterflies is called ___.

1. Metamorphosis

2. Emerging

3. Morphosis

4. Blossoming

Q. The larvae, also called ______, hatches from the eggs laid by the female silkmoths.

1. cocoon
2. caterpillar
3. pupa
4. butterfly

Q.

The silk fiber is obtained from the stem of a plant.

1. True
2. False

Q.

Question 8
Match the words of Column I with those given in Column II:
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{1. Scouring}& \text{(a) Yields silk fibres}\\ \text{2. Mulberry leaves}& \text{(b) Wool yielding animal}\\ \text{3. Yak}& \text{(c) Food of silk worm}\\ \text{4. Cocoon}& \text{(d) Reeling}\\ & \text{(e) Cleaning sheared skin}\end{array}$

Q.

Question 18

Write a caption for each of the figures given as Figure 3.2 (a-d).

Q. Which of the following phenomenon explains moulting?

1. Hatching of silkworm.
2. Leaving the new skin by a silkworm.
3. Leaving the old skin to make way for a new growth.
4. Hatching of silkworm and the feeding period.

Q.

Question 2
Is silkworm a caterpillar or a larva of silkmoth?

Q. Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.
(D) 1 : Thorough washing
2 : Animal fibre
3 : Long thread like structure
Across
(A) 1 : Keeps warm
2 : Its leaves are eaten by silkworms
3 : Hatches from egg of moth

Q.

Stages in the lifecycle of silkworm are given below. Write them in sequential order: pupa, silkworm, egg, silk moth.

Q.

Give reasons for the following:

Silkworms are collected before they become silk moths.

Q.

____________ is the widely used silk worm for sericulture.

Q. The process in which pupa develops to form adult moth is known as.

1. breeding
2. metamorphosis
3. reeling
4. blossoming

Q.

What is meant by the following terms? (i) Rearing (ii) Shearing (iii) Sericulture

Q.

Silkworms are ____ of the silkmoth.

1. larvae

2. silkworm

3. Both larvae and silkworm

4. Neither larvae nor silkworm

Q. What is meant by the following terms?
(i) Sericulture
(ii) Scouring
(iii) Rearing

Q. Describe the life history of silk moth with the help of figures of various stages. [4 marks]

Q. Lac producing insect is__________________.

1. Lytta
2. Tachardia
3. Bombyx
4. Bombus

Q.

Previous question had a error it was :

What is the difference between a larve and cocoon ?

Q. The process in which pupa develops to form adult moth is known as.

1. breeding
2. metamorphosis
3. reeling
4. blossoming

Q.

1. What is the next stage of the caterpillar?

Q.

The silk covering over silkworm is known as ___.

Q.

Question 21

Complete the paragraph related to the life history of silk moth by filling in the blanks.

The (a) ___ silk moth lays (b) ___, from which hatch (c) ___ called (d) ___ or (e) ___. They grow in size and when the caterpillar is ready to enter the next stage of its life history called (f) ____, it first weaves a covering to hold itself, which is known as (g) ____.

Q.

Question 12 (a)

State whether the following statements are True or False. If false, correct them.
(a) Silkworms are caterpillars of silk moth.

Q.

Explain the life cycle of silk moth. [ 3 MARKS]

Q. Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.
(D) 1 : Thorough washing
2 : Animal fibre
3 : Long thread like structure
Across
(A) 1 : Keeps warm
2 : Its leaves are eaten by silkworms
3 : Hatches from egg of moth

Q.

Question 25

Describe the life history of silk moth with the help of figures of various stages.

Q.

Choose the option that correctly arranges the statements given below in order with respect to silk worm rearing.

I.Eggs are bought and incubated under controlled conditions

II. Silk cocoons are boiled

III. Silk fibres are extracted

IV. Egg hatch into larvae

V. Larvae weave a cocoon around themselves to metamorphose

VI. Larvae are fed mulberry leaves making them grow

1. I, II, III, IV, V, VI

2. I, IV, VI, V, III, II

3. I, IV, V, VI, II, III

4. I, IV, VI, V, II, III

Q. Which among the following is the correct order for the processing of silk?

1. Reeling $\to$ stifling $\to$ weaving
2. Stifling$\to$ weaving $\to$ reeling
3. Stifling$\to$ reeling $\to$ weaving
4. Reeling $\to$ weaving $\to$ stifling