In maize, hybrid vigour is exploited by:

1. bombarding the seeds with DNA

2. crossing of two inbred parental lines

3. harvesting seeds from the most productive plants

4. inducing mutations

 

Which one of the following is a viral disease of poultry?

1. Salmonellosis

2. Coryza

3. Newcastle disease

4. Pasteurellosis

Which one of the following is being utilized as a source of bio-diesel in the Indian countryside?

1. Euphorbia

2. Beetroot

3. Sugarcane

4. Pongamia

Crop plants grown in monoculture are:

1. low in yield

2. free from intraspecific competition

3. characterized by a poor root system

4. highly prone to pests

Triticale, the first man-made cereal crop, has been obtained by crossing wheat with:

1. rye

2. pearl millet

3. sugarcane

4. barley

Select the incorrect statement:

Hisardale a new breed of sheep developed in Punjab by crossing Bikaneri ewes and Merino rams is an example of 

1. Outcrossing

2. Cross-breeding

3. Interspecific hybridisation

4. Outbreeding

Choose incorrect option :

1. More than 70 % of world livestock population is in India and China

2. Milk yielding capacity of buffaloes is three times more as compared to cows

3. Buffalo milk is superior to cow milk with respect to fat and mineral content 

4. Continuous inbreeding increases the productivity of milk

Major drawback of inbreeding is 

1. Increase in homozygosity

2. Decrease in immunity

3. Reduction in fertility

4. Increase in food consumption