Tag: economic biology

Questions Related to economic biology

Which of the following procedures are followed in dairy farm management? 
(i) Regular inspections and visits by veterinary doctors.
(ii) Usage of manure to increase crop yields.
(iii) Adequate environmental condition is provided. 
(iv) Weeding away unproductive and harmful plants from the brood house.

zoology economic biology dairy farm management cattle farming production of food from animals

  1. (i) and (ii)

  2. (i) and (iii)

  3. (iii) and (iv)

  4. All of these

Show answer
Correct Option: B
Explanation:

Dairy farm is the management of animals for milk and its products for human consumption. 

The processes and systems that increase yield and improve the quality of milk are 
Health care and social well being of the animals.

The breed of cow with maximum lactation period in the world is

zoology economic biology dairy farm management cattle farming production of food from animals

  1. Frieswal

  2. Gir

  3. Holstein

  4. Nili Ravi

Show answer
Correct Option: C
Explanation:

Holstein Friesian is the cow of Australian breed and it has the maximum lactation period. It yields around 10,000 L of milk per year.

Hence, the correct answer is 'Holstein'

Which of the following procedures are followed in dairy farm management?

zoology economic biology dairy farm management cattle farming production of food from animals

  1. Regular inspections and visits by veterinary doctors

  2. Usage of manure to increase crop yields

  3. Adequate environmental condition is provided

  4. Weeding away unproductive and harmful plants from the brood house

Show answer
Correct Option: A

Best milk yeilding breed of cattle is

zoology economic biology dairy farm management cattle farming production of food from animals

  1. Red Sindhi

  2. Deoni

  3. Holstein Friesian

  4. Sahiwal

Show answer
Correct Option: C
Explanation:

Holstein Friesians are a breed of cattle, known today as the world's highest-production dairy animals. Originating in Europe, Friesians were bred in Netherlands and more specifically in the two northern provinces of North Holland and Friesland, and North Germany. 

They have distinctive markings, usually black and white or black red in color. The cattle is characterized by good durability, high productivity and high fat and and protein levels in milk, making it a cost-effective and highly profitable livestock on farms around the world. This dairy cattle produced milk 32,740 kg in 365 days. Hence, option C is correct.

Exotic dairy breeds of cattle _________________.

zoology economic biology dairy farm management cattle farming production of food from animals

  1. Are non-indigenous breeds of cattle

  2. Are only found in India

  3. Both A and B

  4. None of the above

Show answer
Correct Option: A
Explanation:

Explanation: Exotic cattle were first introduced into this region by colonial farmers. Thus, the origin of exotic cattle is generally traced back to Europe. The most common exotic dairy breeds in the region are Friesian, Holstein, Ayrshire, Jersey, Guernsey and Sahiwal. However, the Friesian breed predominates.

Milk is

zoology economic biology dairy farm management cattle farming production of food from animals

  1. Deficient in some of the essential amino acids

  2. Deficient in some of the essential fatty acids

  3. Contains all the essential fatty acids but in low quantity

  4. Full of all the food ingredients

Show answer
Correct Option: C
Explanation:

Milk is an emulsion. Human milk contains maximum amount of lactose (milk sugar). It contains all the amino acids in proper amount. It contains all the essential fatty acids but in low quality. Linoleic, linolenic and arachidonic acid are the essential fatty acids. Only few animals have the mechanism to synthesise these fatty acids.

The highest fat content is found in the milk of

zoology economic biology dairy farm management cattle farming production of food from animals

  1. Camel

  2. Cow

  3. Buffalo

  4. Reindeer

Show answer
Correct Option: C
Explanation:
Camel: 5.5% fat
Cow: 4% fat.
Buffalo: 8% fat.
Reindeer: 5% fat.

So, the correct answer is 'Buffalo'.

How many litres of water should be added to $45$ litres of $90\%$ concentrated milk to reduce the concentration to $75\%$?

zoology economic biology dairy farm management cattle farming production of food from animals

  1. $8$ litres

  2. $9$ litres

  3. $10$ litres

  4. $12$ litres

Show answer
Correct Option: A
Explanation:

Total milk by volume=90% of 45=40.5 litre of milk.

In the diluted case, let the total volume be 'x' litre. So, 75% of x=40.5 l.
So, x=54 litre, thus volume of added water = (54-45)l= 9 litre.

So the correct option is '9 litres'.

The milk of which one of these animals has more fat content?

zoology economic biology dairy farm management cattle farming production of food from animals

  1. Cow

  2. Buffalo

  3. Sheep

  4. Goat

Show answer
Correct Option: B
Explanation:

Buffalo milk is white, a non-transparent liquid produced by the mammary animal. It is a healthy and nutritious daily drink and can be consumed by people of all ages. It has a very high content of fats. It is rich in a variety of minerals and vitamins and therefore buffalo milk has nutritional value. 100 grams of buffalo milk has 97 calories. However, calories from fat are only 8 grams. Whereas cow milk contains  3.9 gram, sheep contains 7 grams and goat milk contains 3.5 grams. Thus, the correct answer is option B.