Test Preparation on Strategies for enhancement in food production - Biology Test Series for NEET - 2020
Green revolution in India occurred during
Agriculture was originated in mesolithic age about
(c) Origin of agriculture dates back to 7000–13000 years
ago in high and well watered lauds of Indus, Tigris, Nile
and Euphrates.
Sonalika and kalyan Sona are high yielding varieties of
In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are
(d) In wheat total number of chromosomes is –6 × 7 = 42.
Thus n = 21 and x = 7
In plant breeding programme, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called
The process of mating of individuals, which are more closely related than the average of the population to which they belong, is called
Or
Which of the following is not used for crop improvement
(a) Introduction, hybridization and mutations are methods
of plant breeding.
Green house crops such as tomatoes and bell pepper produce higher yields. This is due to
(a) CO2 enriched atmosphere leads to higher yields
(b) CO2 is a limiting factor to photosynthesis
(c) Due to diffused light in green house
(d) Tomatoes and bell pepper are not C3 plants
Desired improved varieties of economically useful crops are raised by
(c) In hybridization, two or more plants of unlike genotypes
are crossed together to get offsprings with new desirable
combinations of characters as a result of genetic
recombinations.
Production of plant without fertilization is done by
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