3. STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION
2020
SAY
1. There are five
main steps in breeding a new genetic variety of a crop. (3)
(a)
Write that five
steps.
(b)
Name a semi-dwarf
variety of wheat produced in India.
ü Answer:
(a) (i)
Collection of variability
(ii) Evaluation and selection p
(iii) Cross hybridisation among
(iv)Selection and testing of
(v) Testing, release and commercialization of new
cultivars
(b) Sonalika/ Kalyan Sona
2020
MARCH
1. .....................
is a better yielding semi dwarf variety of rice developed in India. (1)
a.
Sonalika b. Kalyan Sona
c.
IR-8 d. Jaya
ü Answer:
(d) Jaya
2. What is
biofortification? Write any two objectives of biofortification. (2)
ü Answer:
Biofortification is the breeding crops with high
levels of vitamins, minerals, proteins etc. to improve public health.
Objectives:
To improve
Protein content and quality.
To improve
Oil content and quality.
To improve
Vitamin content.
2019
SAY June
1. Explant and
totipotency are two terms related to tissue culture. (3)
a.
Define these
two terms.
b.
What is a
somaclone?
ü Answer:
(a) Explant: Any part of a plant taken out and
grown in a nutrient medium.
Totipotency: Capacity to generate a whole plant from a cell or
explant.
(b) Somaclone: Genetically identical offspring
developed through tissue culture.
2019
MARCH
1. Outbreeding in
animals may be outcrossing, crossbreeding and interspecific hybridisation. (3)
a.
Give an example
for a progeny obtained by interspecific hybridisation.
b.
How does
outcrossing differs from crossbreeding?
ü Answer:
(a) Mule.
(b) Outcrossing: Cross between individuals of
same breed but beyond 4 to 6 generations.
Crossbreeding: Cross between individuals of two different breeds.
2018
SAY June
1. Identity the
freshwater fish from the following: (1)
a.
Sardine
b.
Mackerel
c.
Rohu
d.
Hilsa
ü Answer:
(c) Rohu.
2. Your friend
wishes to start a poultry farm. What are the important suggestions given to him
for successful management of the farm? (2)
ü Answer:
Ÿ Selection of suitable and disease-free breeds of
poultry.
Ÿ Proper and safe farm conditions.
2018
MARCH
1. Select the
disease resistant variety of Bhindi produced by mutation breeding. (1)
(a) Himgiri (b) Parbhani
Kranti
(c) Pusa Gaurav (d) Pusa
Komal
ü Answer:
(b) Parbhani kranti.
2. Controlled
breeding experiments can be carried out using artificial insemination. What are
the advantages of this process? (2)
ü Answer:
Collected semen may be used immediately or can be
frozen for later use.
Frozen semen can also be
transported.
3. Bio-fortification
is a practical approach to improve the public health. Name any four such crops
released by IARI. (2)
ü Answer:
Ÿ Vitamin A enriched carrots, spinach, pumpkin.
Ÿ Vitamin C enriched bitter gourd, bathua, mustard,
tomato.
Ÿ Iron & calcium enriched spinach & bathua.
Ÿ Protein enriched
beans.
pearfect
ReplyDelete