Which one of the following occurs in radioactive fall out and behaves like calcium in biogeochemical cycling of material in ecosystem?
Options
(a) strontium – 30 (b) cobalt – 60 (c) cesium – […]
Which pollutant released from motor vehicles?
Options
(a) NO₂ (b) CO (c) NO₃ (d) CH₄
Correct Answer:
CO
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Gumboro disease is caused by
Options
(a) fungus (b) bacteria (c) virus (d) ticks and mites
Correct Answer:
virus
Explanation:
Infectious Bursal disease (IBD), or Gumboro disease, is a viral disease affecting young […]
Heterosis is also called
Options
(a) mutation (b) hybrid vigour (c) variation (d) hybrid sterility
Correct Answer:
hybrid vigour
Explanation:
Hybrid vigour or heterosis is defined as the superiority of the hybrid over […]
Honey is
Options
(a) acidic (b) alkaline (c) salty (d) neutral
Correct Answer:
neutral
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
In crop improvement programmes, virus free clones can be obtained through
Options
(a) embryo culture (b) shoot apex culture (c) grafting (d) hybridization
Correct Answer:
shoot apex culture
Explanation:
Apical meristems or shoot […]
In high yielding hybrid crop varieties, to exploit hybrid vigour, the farmers need to purchase fresh hybrid seed every year, because
Options
(a) it is cheaper to purchase fresh seed (b) hybrid vigour […]
In honey, the main constituent is
Options
(a) calcium (b) sugar (c) protein (d) none of these
Correct Answer:
sugar
Explanation:
Honey is a mixture of sugar, minerals, water and antibodies. Sugar content […]
In India, the spread of Opuntia was controlled by
Options
(a) introducing insects (b) spraying D.D.T. (c) letting loose cattles (d) growing trees
Correct Answer:
introducing insects
Explanation:
The control of pests by biological […]
In tissue culture, addition of which of the following substance promotes the growth of buds?
Options
(a) colchicine (b) urea (c) auxins (d) cytokinin
Correct Answer:
cytokinin
Explanation:
In tissue culture both auxin and […]
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