Home
Class 12
BIOLOGY
A spider spins the web by means of a sec...

A spider spins the web by means of a section of

A

Abdominal glands

B

Salivary glands

C

Thoracic glands

D

Mouth

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Identify the Organism**: The question refers to a spider, which is an arachnid belonging to the phylum Arthropoda. 2. **Understand the Function**: The spider spins webs, which are essential for its survival as they are used for trapping prey and creating shelters. 3. **Locate the Glands**: The web-spinning ability of spiders is associated with specific glands. In spiders, these glands are located in the abdominal region. 4. **Identify the Type of Glands**: The glands responsible for silk production are known as silk-producing glands. Spiders have multiple silk glands (typically seven) that secrete proteins. 5. **Mechanism of Silk Production**: The proteins secreted by these glands are excreted through structures called spinnerets, which are also located at the abdomen of the spider. 6. **Evaluate the Options**: - Abdominal glands (correct) - Salivary glands (incorrect) - Thoracic glands (incorrect) - Mouth (incorrect) 7. **Conclusion**: Therefore, the correct answer to the question is that a spider spins the web by means of the section of the abdominal glands. **Final Answer**: The correct option is **1. Abdominal glands**. ---
Promotional Banner

Topper's Solved these Questions

  • PHYLUM - ARTHROPODA

    DINESH PUBLICATION ENGLISH|Exercise CYG|20 Videos

  • PHYLUM - ANNELIDA

    DINESH PUBLICATION ENGLISH|Exercise Check your grasp|10 Videos

  • PLANT BREEDING AND DISEASE CONTROL

    DINESH PUBLICATION ENGLISH|Exercise Check your Grasp|10 Videos

Similar Questions

Explore conceptually related problems

A spider is hanging by means of its own silk thread directly above a transparent fixed sphere of radius R=20cm as shown in the figure. The refractive index of the material of the sphere is equal to sqrt(2) and the height of the spider from the centre of the sphere is 2R(=40cm) . An insect, initially sitting at the bottom, starts crawling on the sphere along a vertical circular path with the constant speed of pi//4 cm//s . For how long time the insect will be invisible for the spider, assume that it crawls once round the vertical circle.

Nexia biotechnologies spliced spider genes into the cells of lactating

Spin of electron is

Spider web is secreted by

The differnece in the number of unpaired electrons of a metal ion in its high-spin and low-spin octahedral complexes is two. The metal ion is

The differnece in the number of unpaired electrons of a metal ion in its high-spin and low-spin octahedral complexes is two. The metal ion is

Spider prepare the web with the help to

A spider is on the surface of a glass sphere with a refractive inndex of 1.5 . An insect crawls on the other side of the sphere as shown in Fig. For what maximum value of theta will the spider be able to still see the insect. Assume the spiders eye is in air.

A spider and a fly are on the surface of a glass sphere. As the fly moves on the surface, find the maximum area on the glass sphere for the spider to be able to see it? Assume that the radius of the sphere (R) is much larger than the sizes of the spider and the fly. take the refractive index of glass mu_(g) to be equal to sqrt(2) .

A uniform bar of length 12L and mass 48m is supported horizontally on two fixed smooth tables as shown in figure. A small moth (an insect) of mass 8m is sitting on end A of the rod and a spider (an insect) of mass 16m is sitting on the other end B. Both the insects moving towards each other along the rod with moth moving at speed 2v and the spider at half this speed (absolute). They meet at a point P on the rod and the spider eats the moth. After this the spider moves with a velocity v/2 relative to the rod towards the end A. The spider takes negligible time in eating on the other insect. Also, let v=L/T where T is a constant having value 4s . After starting from end B of the rod the spider reaches the end A at a time