CHAPTER 31: Strategies for Enhancement in Food Production

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called

Outbreeding is an important strategy of animal husbandry because it

Tissue culture technique can produce infinite number of new plants from a small parental tissue. The economic importance of the technique is in raising

Which of the following enhances or induces fusion of protoplasts?

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

Explant is required to be disinfected before placing in culture. This is done by

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

Artificial selection to obtain cows yielding higher milk output represents

Homozygous purelines in cattle can be obtained by

A geneticist isolates a gene for a specific trait under study, she also isolates the corresponding mRNA. Upon comparison, the mRNA is found to contain 1,000 fewer bases than the DNA sequence. Did the geneticist isolate the wrong DNA ?

Read the following statements.

(i)Out-breeding is the breeding of the unrelated animals which may be between individuals of the same breed but having no common ancestors for 4 – 6 generations or between different breeds or different species.

(ii)Cross-breeding allows the desirable qualities of two different breeds to be combined.

(iii)In interspecific hybridisation, male and female animals of two different related species are mated.

Which of the following statement(s) is/are correct?

The long-term prospects for a truly human civilization depend in a large measure on

The transgenic animals are those which have

‘Which of the following is not correctly matched with its variety?