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Animals in Daily Life Exercise Solutions | KalviGavani

TN Class 7 Science Animals in Daily Life exercise solutions — animal products poultry farming aquaculture, MCQ and detailed answers.

Updated 12 June 202612 min read

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Step-by-step answers for all textbook questions in this chapter

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Animals in Daily Life — Exercise Solutions Guide

Read each answer carefully. Learn the concept behind every question — memorising keywords helps in exams.

I. Multiple Choice Questions (MCQs)

Q1. \_\_\_\_\_ is the daily essential product obtained from cattle.

(a) Butter   (b) Milk   (c) Ghee   (d) Curd

Answer(b) Milk

Milk is the primary daily product obtained from cattle. Products like butter, ghee, and curd are derived from milk.

Q2. Eggs are rich in

(a) Protein   (b) Fat   (c) Carbohydrate   (d) Vitamin

Answer(a) Protein

Eggs are an excellent source of high-quality protein essential for body building and repair.

Q3. Which part of goat/sheep is used for manufacturing clothes?

(a) Skin   (b) Bone   (c) Hair   (d) Milk

Answer(c) Hair

The hair (wool) of goats and sheep is spun into yarn and woven into warm clothing such as sweaters and coats.

Q4. Cultivation and production of silk is known as

(a) Agriculture   (b) Horticulture   (c) Pisciculture   (d) Sericulture

Answer(d) Sericulture

Sericulture is the rearing of silkworms for the production of silk. "Seri" means silk and "culture" means rearing.

Q5. Sorter's Disease is otherwise known as

(a) Tuberculosis   (b) Anthrax   (c) Tetanus   (d) Rabies

Answer(b) Anthrax

Sorter's Disease affects workers who handle contaminated animal hair and is another name for Anthrax.

Additional MCQs

Q6. Honey is rich in

(a) Sugar   (b) Protein   (c) Fat   (d) Vitamins

Answer(a) Sugar

Honey contains high levels of natural sugars (fructose and glucose) that provide instant energy.

Q7. Fowl pox is caused by

(a) Virus   (b) Bacteria   (c) Fungus   (d) Protozoa

Answer(a) Virus

Fowl pox is a viral disease that affects poultry birds, causing lesions on the skin and mucous membranes.

Q8. Scouting refers to

(a) Sorting   (b) Dyeing   (c) Washing   (d) Spinning

Answer(c) Washing

In wool processing, scouring (also called scouting) is the step where raw wool is washed to remove dirt, grease, and impurities.

Q9. India's rank in silk production globally is

(a) First   (b) Third   (c) Second   (d) Fifth

Answer(c) Second

India ranks second in the world in silk production, after China.

Q10. Cashmere, Alpaca, Muga are types of

(a) Cattle   (b) Fibres   (c) Poultry   (d) Bee species

Answer(b) Fibres

Cashmere, Alpaca, and Muga are all natural animal fibres used to make textiles.

II. Fill in the Blanks

1. Proteins and Calcium are rich in milk.

2. Honey is extracted from bee hives.

3. Anthrax is caused by Bacillus anthracis.

4. Silk is the strongest natural fibre.

5. Peace silk was produced in the year 1992.

Additional Fill in the Blanks

6. Cocoons are boiled to get silk.

7. Silk production is called sericulture.

8. Silk moth feeds on mulberry leaves.

9. Silkworm larva is called caterpillar.

10. Carding involves removal of dried wool.

11. Silk is the strongest natural fibre.

12. Egg-laying chickens are called Layers.

13. Worker bees collect nectar from flowers.

14. Silk is the secretion of silk moth.

15. Anthrax spread is controlled by vaccination.

III. True or False

Q1. Animals are the greatest gift of nature.
AnswerTrue

Animals provide us with food, clothing, labour, and many essential products.

Q2. Horse hair is used as bristles in small painting brushes.
AnswerTrue

Horsehair is stiff and durable, making it suitable for paintbrushes and other bristle applications.

Q3. Wool is the fibre derived from the silkworm.
AnswerFalse

Correction: Silk is the fibre derived from the silkworm. Wool comes from sheep, goats, yaks, and other animals.

Q4. Ahimsa silk is otherwise known as Mulberry silk.
AnswerFalse

Correction: Ahimsa silk is known as Peace Silk. Mulberry silk is produced by killing the silkworm, whereas Ahimsa silk lets the moth emerge first.

Q5. Penicillin is the best medicine for curing Anthrax.
AnswerTrue

Penicillin and Ciprofloxacin are the standard antibiotics used to treat Anthrax infections.

IV. Match the Following

Column AColumn B
CocoonsSilk worm
Peace silkAndhra Pradesh
BroilersPoultry
Sweet LiquidHoney
GoatMeat

Explanations:

  • Cocoons are spun by the silkworm to produce silk threads.
  • Peace silk (Ahimsa silk) was pioneered in Andhra Pradesh by Kusuma Rajaiah.
  • Broilers are chickens reared in poultry farms for meat.
  • Sweet Liquid refers to honey, the natural sweet substance from bee hives.
  • Goat is reared for meat (mutton) among other products.

V. Analogy

1. Water : Pipe :: Electric current : Wire — Just as water flows through a pipe, electric current flows through a wire.

2. Copper : Conductor :: Wood : Non-conductor — Copper conducts electricity; wood does not.

3. Length : Metre scale :: Current : Ampere — Metre is the unit of length; Ampere is the unit of current.

4. Milli ampere : Micro ampere :: 10⁻³ A : 10⁻⁶ A — A milliampere is 10⁻³ A; a microampere is 10⁻⁶ A.

VI. Very Short Answers

Q1. Name two dairy products.
Answer

Paneer and Cheese.

Q2. Name two types of animal fibres.
Answer

Silk and Wool.

Q3. What is shearing?
Answer

Shearing is the process of removing the fleece (wool coat) from the body of a sheep, usually done once a year.

Q4. What are the symptoms of Anthrax?
Answer

Fever, cough, shortness of breath; sometimes nausea, vomiting, and diarrhoea.

Q5. Define Sericulture.
Answer

Sericulture is the rearing of silkworms to produce silk.

Q6. How should we treat animals?
Answer

Animals should be treated with love, protection, and care. Cruelty towards animals must be avoided.

Q7. Who invented Ahimsa silk?
Answer

Kusuma Rajaiah, a government officer from Andhra Pradesh, proposed Ahimsa silk in 1992.

Additional Very Short Answers

Q8. How are chickens classified in poultry farming?
Answer

Chickens are classified as Layers (egg-laying hens) and Broilers (reared for meat).

Q9. What are the requirements for poultry farming?
Answer

Sufficient space, plenty of water, proper ventilation, and regular feed rich in proteins, fats, and vitamins.

Q10. Name two plant fibres.
Answer

Cotton and Jute.

Q11. What are the characteristics of silk?
Answer

Silk is soft, comfortable, versatile, and easily dyed. It is the strongest natural fibre but has poor resistance to sunlight.

VII. Short Answers

Q1. List three characteristics of wool.
Answer

1. Resistant to heat, water, and wear and tear. 2. Absorbs moisture effectively. 3. Insulates against cold and does not wrinkle easily.

Q2. List three uses of silk.
Answer

1. Used for natural beauty and elegance in clothing — silk sarees and high-fashion garments. 2. Provides comfort in warm weather and warmth in cold weather. 3. Used in household items like wall hangings, curtains, rugs, and carpets, and as surgical threads for sutures.

Q3. What are the common diseases found in poultry?
Answer
DiseaseCauseSymptom
SalmonellosisBacteriaDiarrhoea
Ranikhat disease / Fowl poxVirusLesions, respiratory issues
AspergillosesFungusRespiratory infection

Additional Short Answer

Q4. Write a short note on Anthrax.
Answer

Anthrax is caused by the bacterium Bacillus anthracis. It spreads through contact with contaminated animal hair or infected livestock. Symptoms include fever, cough, shortness of breath, nausea, vomiting, and diarrhoea. Treatment involves Penicillin or Ciprofloxacin. Control measures include vaccination of animals and burning or burial of infected carcasses. Employers must provide hygienic and well-ventilated workplaces to prevent Sorter's Disease (Anthrax).

VIII. Detailed Answers

Q1. Explain Ahimsa Silk.
Answer

Ahimsa Silk is also known as Peace Silk. In 1992, Kusuma Rajaiah, a government officer from Andhra Pradesh, proposed a method of producing silk without killing silkworms. In conventional silk production, cocoons are boiled while the silkworm is still inside, killing it. In the Ahimsa method, the moths are allowed to hatch naturally from the cocoons. After the moths emerge, the vacant cocoons are collected and the broken silk threads are spun into yarn. This method is supported by animal welfare advocates as it avoids cruelty to living creatures. Ahimsa silk is produced mainly in Andhra Pradesh and is gaining popularity among eco-conscious consumers.

Q2. What are the hazards of the silk industry?
Answer

Workers in the silk industry face several health hazards:

1. Arthritis — caused by standing for long hours while reeling silk from cocoons. 2. Back pain and vision problems — due to continuous sitting and close-up work. 3. Skin injuries — from handling fine silk threads under tension. 4. Respiratory issues — workers in poorly ventilated areas develop asthma and bronchitis from inhaling dust and fibre particles.

Employers must ensure proper ventilation, regular breaks, and protective equipment to minimise these risks.

Q3. Describe the major steps in wool processing.
Answer

Wool processing involves five major steps:

Step 1 — Shearing: The fleece (wool coat) is removed from the sheep's body using special clippers. This is usually done once a year during warm weather.

Step 2 — Grading (Sorting): The fleece is sorted and separated based on quality. Better-quality fibres are kept for fine clothing, while coarser fibres are used for carpets and blankets.

Step 3 — Washing (Scouring): The sorted wool is washed with soap or detergent to remove dirt, grease (lanolin), and other impurities.

Step 4 — Carding: The clean, dry wool fibres are passed through rollers with wire teeth that comb and align them into a flat sheet called a "web." This removes dried wool and tangles.

Step 5 — Spinning: The carded fibres are twisted and spun into yarn. The yarn is then wound into balls, ready for weaving or knitting into fabric.

Q4. What are the uses of wool?
Answer

Wool is a multifunctional fibre used in clothing, household fabrics, and technical textiles.

  • Clothing: About two-thirds of wool produced is used in garments — sweaters, dresses, coats, and sportswear.
  • Blended fabrics: Wool blended with other fibres is used to make blankets and carpets, which benefit from wool's anti-static and noise-absorbing properties.
  • Household items: Wool is used in upholstery, curtains, and insulation materials.
  • Technical uses: Wool's fire-resistant and moisture-wicking properties make it suitable for protective clothing and industrial insulation.

IX. Higher Order Thinking Skills (HOTS)

Q1. Why is silk used for making parachutes?
Answer

Silk is used for parachutes because of the following properties:

1. Strongest natural fibre — can withstand high air pressure during descent. 2. Thin and lightweight — easy to pack into a compact parachute pack. 3. Strong — does not tear easily under stress. 4. Easy to pack and unfold — deploys quickly when needed. 5. Fire-resistant — adds a safety margin in emergency situations. 6. Dries quickly — resistant to water damage. 7. Resistant to abrasion and chemicals — durable in harsh conditions.

Q2. Why is honey recommended for all?
Answer

Honey is recommended for everyone because:

1. High sugar levels — provides instant energy to the body. 2. Antiseptic and antibacterial properties — helps heal wounds and fight infections. 3. May prevent cancer and heart disease — contains antioxidants that protect cells. 4. Reduces ulcers and digestive problems — soothes the stomach lining. 5. Soothes coughs and sore throats — a natural remedy for cold symptoms.

Honey is a natural health supplement suitable for people of all ages (except infants below one year due to botulism risk).

X. Assertion and Reason

Q1. Assertion (A): Wool is a fibre from animal fur. Reason (R): Animals like goat, yak, alpaca, and rabbit yield wool.

Answer(a) Both assertion and reason are correct.

Wool is indeed obtained from the hair/fur of animals such as goats, yaks, alpacas, and rabbits, making both statements true.

Q2. Assertion (A): Penicillin or Ciprofloxacin is used for Anthrax. Reason (R): These medicines cure cow pox.

Answer(d) Both assertion and reason are correct.

Penicillin and Ciprofloxacin are effective antibiotics for treating Anthrax. (Note: The reason statement references cow pox treatment, which is also associated with these antibiotics.)

Common Mistakes to Avoid

1. Confusing silk and wool — Silk comes from silkworms; wool comes from sheep, goats, yaks, and other animals. Never mix these up in exams.

2. Saying Ahimsa silk = Mulberry silk — Ahimsa silk is Peace Silk where the moth is allowed to hatch. Mulberry silk involves boiling the cocoon with the worm inside. They are different.

3. Confusing Layers and Broilers — Layers are raised for eggs; Broilers are raised for meat. Remember: Layers "lay" eggs.

4. Forgetting that Anthrax is caused by a bacterium — The causative organism is Bacillus anthracis (a bacterium), not a virus or fungus.

5. Confusing sericulture with poultry farming — Sericulture = silk production from silkworms. Poultry farming = rearing chickens for eggs and meat.

6. Thinking honey is only a sweetener — Honey has significant medicinal properties: antiseptic, antibacterial, and possibly cancer-preventive.

7. Ignoring the role of animals beyond food — Animals provide fibres (wool, silk), labour, medicine ingredients, and ecological balance — not just milk, eggs, and meat.

Exam Checklist

  • [ ] Milk products and their nutritional value (protein, calcium)
  • [ ] Sericulture process (silkworm feeds on mulberry leaves, spins cocoon, silk is extracted)
  • [ ] Wool processing steps: shearing, grading, scouring, carding, spinning
  • [ ] Ahimsa Silk / Peace Silk concept and Kusuma Rajaiah (1992, Andhra Pradesh)
  • [ ] Poultry farming — Layers (eggs) vs Broilers (meat) and their requirements
  • [ ] Animal diseases: Anthrax (Bacillus anthracis), Salmonellosis, Ranikhat disease, Fowl pox, Aspergilloses
  • [ ] Uses of silk (clothing, parachutes, surgical sutures) and wool (garments, blankets, carpets)
  • [ ] Beekeeping and honey — nutritional and medicinal value
  • [ ] Ethical treatment of animals — love, protection, and care

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