RBSE Solutions For Class 12 Biology Chapter 41: Domestication, Culture and Economic Importance of Animals | Textbook Important Questions & Answers

RBSE Class 12 Biology Chapter 41-Domestication, Culture and Economic Importance of Animals. In this chapter, students can learn in detail about poultry farming, different types of birds in poultry, systems of breeding, selection of different birds for breeding, systematic of the mating of birds, important events of embryo development, natural and artificial incubation, benefits of cage system, poultry food, fish culture, apiculture, sericulture and lac culture. It also deals with different breeds of fowl, ducks, turkey, desi breeds, exotic breeds, different systems of breeding, natural and artificial brooding, management of cage layers, different types of poultry feeds, common diseases of the poultry life cycle of the mulberry silk moth, diseases of the silkworm, and much more.

These important questions help students to perform exceptionally well in their exams. By practising these important questions, students can analyze their preparation, get a thorough knowledge about all the important terminologies and perform their best in the examinations.

RBSE Solutions for Class 12 are the best study material for both class assignments and other board examinations. By practising these important questions, students can gain deep knowledge about the topics explained in this chapter and also help them to be well prepared for their upcoming examinations.

RBSE Class 12 Biology Chapter 41 Important Questions

RBSE Biology Chapter 41: MCQ Type Questions

Q.1. Which one of these indigenous species are used for poultry farming?

(a) Pekin

(b) Aseel

(c) White Leghorn

(d) New Hampshire

Sol: (b) Aseel

Q.2. The incubation period of the hen eggs are _________.

(a) 21 days

(b) 25 days

(c) 28 days

(d) 30 days

Sol: (a) 21 days

Q.3. Poultry farming provides_________.

(a) Eggs and honey

(b) Meat and lac

(c) Eggs and wax

(d) Meat and eggs

Sol: (d) Meat and eggs.

Q.4. Which stage of the silkworm produces silk?

(a) Eggs

(b) Cocoon

(c) Caterpillar

(d) Adult

Sol: (b) Cocoon.

Q.5. The scientific name of Europian honey bee is _________.

(a) Apis welfare

(b) Apis force

(c) Apis India

(d) Apis Florida

Sol: (a) Apis welfare

Q.6. The function of the queen honey bee is _________.

(a) Control on other honey bees

(b) Protective bee-hive

(c) Perform reproduction

(d) Prepare honey

Sol: (c) Perform reproduction.

Q.7. Which of the following is not a major carp?

(a) Labeo Raita

(b) Catla Catla

(c) Chanos Chanos

(d) Cirrhinus Regalia

Sol: (c) Chanos Chanos.

Q.8. Anthrax diseases of the cattle are called_________.

(a) Viral diseases

(b) Helminth diseases

(c) Bacterial diseases

(d) Protozoan diseases

Sol: (c) Bacterial diseases.

Q.9. The host plant of Kusumic lac is _________.

(a) Kher

(b) Ber

(c) Babul

(d) Sheesham

Sol: (b) Ber

Q.10. Which of the following silkworms produces Muga silk?

(a) Bombay mori

(b) Antheraea Bahia

(c) Antheraea recent

(d) Antheraea assassins

Sol: (d) Antheraea assassins.

RBSE Biology Chapter 41:Short and Long Answer Type Questions.

Q.1.What is Domestication?

Sol: Raising and breeding of animals for various purposes by a man is called domestication.

Q.2.What are the layers?

Sol: The layers are defined as the special species of hens, which are reared to lay eggs.

Q.3. What are fish seeds?

Sol: The fish seeds are the fertilized eggs of the fish, which are used for fish farming or the pisciculture.

Q.4. What is the position of India in poultry farming?

Sol: India holds the sixth position among all other countries in the world in poultry farming.

Q.5. What is pisciculture?

Sol: The pisciculture is the rearing and management of fishes for various purposes.

Q.6.Give the names of two research centres in India working in pisciculture?

Sol: The two research centres in India working in pisciculture are:

1. Central Inland Fisheries Research Centre.
2. Central Marine Fisheries Research Centre.

Q.7. What are the scientific names of lac insect and the Europian honey bee?

Sol: The scientific name of lac insect is Lucifer lack.

The scientific name of the Europian honey bee is Apis welfare.

Q.8. What is Sericulture?

Sol: Sericulture is the process of cultivating silkworms and extracting silk from them. It is a very important domestic industry in many countries. India and China are the world’s leading producers of silk.

Q.9. What are the precautions taken during the process of beekeeping?

Sol: Beekeeping is also called Apiculture. The safety measurements or the precautions, which should be followed during the process of beekeeping are:

• Source of freshwater must be in the nearest vicinity.
• Artificial beehives should be kept in cool and shady areas.
• Plants of both fruits and flowers should be within a shorter distance, which should be approximately one kilometre away from the beehives.

Q.10. What is the process followed in sericulture?

Sol: For the production of mulberry silk, the process sericulture includes three main steps.

Mariculture – the cultivation of mulberry leaves.

Silkworm rearing – promoting the growth of the silkworm.

Silk reeling – the extraction of silk filaments from the silkworm cocoons

Finally, the silk filaments are woven together to form a thread. These threads are often plied together to form a yarn.

Q.11.Brief out the stages involved in the production of silk from the silkworm.

Sol: The stages involved in the production of silk from the silkworm are:

Stage 1

Female silk moths lay eggs.

Stage 2

Eggs are warmed to a suitable temperature for the larvae to hatch from eggs.

Stage 3

The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves.

Stage 4

After 25 to 30 days, the caterpillars stop eating and start spinning cocoons.

Stage 5

Cocoons are kept under the sun or boiled in water.

Stage 6

Fibres are taken out from the cocoon.

Q.12.What is poultry farming?

Sol: Poultry farming mainly refers to growing, protecting and rearing various types of domestic birds commercially for various purposes. It is done for two purposes:

• Production of the eggs.
• Production of meat or flesh.

Q.13. What is the importance of poultry farming?

Sol: Poultry farming is beneficial for the production of egg and meat for commercial purposes. Millions of chickens are raised across the world as a good source of food in the form of eggs and meat.

Q.14. Explain in brief the social organization in the honey bees.

Sol: The social organisation of the Honey bee is:

A colony of honey bees shows a high-grade social organisation and division of labour. A colony of honey bee consists of three kinds of individuals or castes:

• Queen

In the whole colony, there will be only one adult queen of a large size, which arises from a fertilized egg and when the larva is especially fed on royal jelly. The queen is only fertile in the beehive, having huge developed ovaries. The function of a queen is only of reproduction .i.e. it lays eggs.

• Drones

Drones are developed from the unfertilized eggs .i.e. parthenogenetically. The function of drones is only to mate with the queen to fertilize the eggs.

• Workers

They are sterile females who are developed from an unfertilized egg. Their number varies from 3000 to 6000 or more. The worker bees are of three types:

1. Sanitary bees- These bees clean the chambers of the hive.
2. Nurse bees- These workers look after the queen and hive.
3. On the basis of the ages, these bees are classified into three types:

• Foster mother

1. They are the nurse workers for 4 to 6 days.
2. They feed a mixture of honey and nectar to infants.
3. The nurse workers for 7 to 11 days.
4. They secrete royal jelly which is secreted by the maxillary glands.
5. Nurse workers for 12 to 15 days.
6. They secrete wax from the wax glands during the period of 4 days.
7. This wax is used to repair and reconstruct hives.
8. The wax glands get functional up to the 12th day.
9. They secrete propolis which is a gum-like substance.

The nurse workers are of four types:

1. Fanning bees- They fly stationary near the nest to maintain airflow.
2. Sentinel bees- They act as a guard of the nest.
3. Soldier bees- They protect the hive intruders. They also check the honey collected by the bees.
4. Retinue bees-They clean the queen and queen chambers. They also feed royal jelly to the queen and transfer eggs to other chambers.

• Scout bees

1. They are also called field or foraging bees.
2. They search for new food sources and collect nectar and pollen.
3. In a day they collect food for 7 to 15 times.
4. They also collect water
5. The water requirement of a hive is about 2 litres per day.

Q.15. Give the names of main species of the silkworm and the silk produced by them.

Sol: The main species of the silkworm are:

Q.16. What is pisciculture?

Sol: The artificial reproduction, rearing and transplantation of fish is called pisciculture. It is also called fish farming. It is the main type of aquaculture whereas other methods can fall within the framework of mariculture. This includes the commercial raising of fish in tanks or enclosures, typically for food. Fish species from fish farms include cabbage, tilapia catfish and salmon.

Types of Cultivable Fishes:

The cultivable fishes are of three types:

• Indigenous or naturally occurring freshwater fishes.

Examples of naturally occurring freshwater fishes are major carps.

• Some marine fishes which get adapted to freshwater.

Examples of marine fishes are Mullets, Chanos, etc.

• Exotic fishes: These fishes are brought from foreign countries.

Examples of exotic fishes are Common carp, Chinese carp, Crucian carp, Mirror carp.

Methods of Fish Farming

Fish farming involves the following three methods:

• Intensive Fish Farming.
• Extensive Fish Farming.
• Semi-intensive Fish Farming.

Advantages of Fish Farming

• Fish in a pond are nearby.
• The farmed fish provides high-quality protein for human consumption.
• The farmers can select the fish species with desired characteristics to raise.
• Fish in a pond are not accessible to everyone. Thus, they are secured and are harvested at will.
• Fish farming can be integrated into the existing farm to create additional income and improve its water management.

Q.17. What are the common diseases of poultry?

Sol: The common diseases of poultry include:

• Fever.
• Botulism.
• Fowlpox.
• Ranikhet.
• Diarrhoea.
• Fowl cholera.
• Fowl typhoid.
• Necrotic enteritis.
• Lymphoid leukosis.
• Infectious bronchitis.

Q.18. Give an account of diseases found in silkworm.

Sol: Diseases of silkworm:

Silkworm can have many diseases. The main diseases found in silkworm are of two types:

Fletcher and Brasserie

These diseases are caused by viruses.

Pebrine

These diseases are caused by viruses.

It is divided into two types, based on the causative agents:

• Viruses Pebrine

It is caused by Borrelia bombycid virus.

This virus affects the larva, which starts dying after 8 to 10 days of the infections.

For prevention and protection from this virus, the dead larva should be separated and instruments should be rinsed with 30 per cent of Trichloroacetic acid solution for about 12 to 15 minutes and then washed with water.

• Protozoan Pebrine

It is caused by Nosema bombycis protozoa.

It affects both the larva and the adult silkworm. In adult silkworm, the Nosema bombycis protozoa affect the shape and the size of the larva. After the infection, the adult silkworm gets irregular and shrinks in its size. The infected larva becomes smaller units size. There is a death of the larva before the formation of cocoons. For protection, only the eggs from the healthy worms should be used.

Q.19. What are the significances of Beekeeping

Sol: The main significances or importance of beekeeping are:

• It provides honey which is the most valuable nutritional food.
• It plays an excellent role in pollination. Honey bees are the best pollinating agents which help in increasing the yield of several crops.
• It provides bee wax, which is used in many industries, including cosmetics industries, polishing industries, pharmaceutical industries, etc.
• According to recent studies, the honey bee’s venom contains a mixture of proteins which can potentially be used as a prophylactic to destroy the HIV virus that causes AIDS in humans.

Q.20. List out the birds useful in poultry.

Sol: There are many species of birds used in poultry farming. Some of the most important species of birds are given below:

Fowl

Also called hens.

In India domestic fowl, Gallus gallus domesticus is the main species in poultry farming. The two types of fowl breeds are:

1. Indigenous breeds- It is also called the Desi breeds. These breeds include Aseel, Kakarnath, Brahma, Busara, Ghagus, Chittagong, etc. Aseel variety is used in cockfighting and it is reared like a game bird.
2. Exotic breeds – It is mostly a European hen and is included as exotic birds. The most important foreign breeds are White Leghorn, Plymouth Rock, Rhode island red, New Hampshire, etc. These breeds are considered as a super breed variety.

Ducks

Ducks, Anas platyrhynchos is a source of eggs and meat. In India, 6 to 7 per cent of the poultry population is contributed by ducks. The ducks are found in the southern and eastern states of India. The Indian Runner, Sylhet meta and Nageshwari are the main Indian breeds, while foreign breeds are Muscari, Pekin, Campbell and Aylesbury.

Turkey

Meleagris gallopavo (Meleagris) has been domesticated in recent years. Some main breeds are British white, Narfold, Broad breasted bronze, Beltsville small, etc.

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