341.
Bhojpatra is obtained from
A
Leaves of Piper betle
B
Bark of Betula utilis
C
Leaves of Cinchona
D
Bark of Cinchona
Answer :
Bark of Betula utilis
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342.
Which of these is a new crop
A
Soyabean
B
Winge4d bean
C
Sugar beet
D
Lentil
Answer :
Winge4d bean
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343.
Biological control component is central to advanced agricultural production. Which of the following is used as a third generation pesticide?
A
Insect repellants
B
Pheromones
C
Pathogens
D
Insect hormone analogues
Answer :
Pheromones
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344.
Silkworm larva spins silk from
A
Inside to outside
B
Outside to inside
C
Random fashion
D
Anterior to posterior side
Answer :
Outside to inside
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345.
Emasculation is achieved by
A
Removal of anther
B
Removal of stigma
C
Removal of entire organisms
D
Removal of plants and sepals
Answer :
Removal of anther
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346.
Queen bee is adapted for
A
Laying eggs
B
Laying eggs and rearing the youngs
C
Preparing honey
D
Controlling other bees
Answer :
Laying eggs
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347.
Haploid plant cultures are obtained from
A
leaves
B
root tip
C
pollen grains
D
buds
Answer :
pollen grains
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348.
Quarantine regulations are concerned with
A
Spraying of diseased plants with insecticide
B
Promotion of dry farming in sandy soil
C
Prevention of entry of diseased plants in country
D
Growing of fruit trees in every state
Answer :
Prevention of entry of diseased plants in country
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349.
What is the best pH of soil for cultivation of plants?
A
3.4 - 5.4
B
6.5 - 7.5
C
4.5 - 8.5
D
5.6 - 6.5
Answer :
6.5 - 7.5
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350.
A petroleum plant is
A
Euphorbia lathyrus
B
Acacia Arabica
C
Pinus roxburghii
D
Prosopis cineraria
Answer :
Euphorbia lathyrus
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