CBSE Questions for Class 12 Medical Biology Strategies For Enhancement In Food Production Quiz 15 - MCQExams.com

The development of improved varieties of plants is mainly by judicious combination of.
  • Inbreeding, outbreeding and outcrossing
  • Plant breeding and tissue culture
  • Plant breeding and plant taxonomy
  • Plant breeding, tissue culture and genetic engineering
Select the correct statements regarding honeybees.
(i) The queen bee and the worker bees develop from fertilized eggs and are sexually females.
(ii) Males (drones) develop parthenogenetically from unfertilized eggs.
(iii) Queen bee feeds upon royal jelly and the worker bees feed upon bee bread. 
  • (i) and (ii)
  • (ii) and (iii)
  • (i) and (iii)
  • (i), (ii) and (iii)
Steps to be followed by a plant breeder to get disease-resistant crops are.
  • Screening of germplasm for disease resistant varieties.
  • Hybridisation of selected parents.
  • Selection and evaluation of the hybrids.
  • Testing and release of new varieties.
Which of the following species of honey bee i reared most commonly in apiaries?
  • Apis indica
  • Apis dorsata
  • Hirsadale
  • Bikaneri ewes
Breeding in Fowl is done between.
  • Six month old hen and cock
  • One year old hen and two year old cock
  • Two year old hen and one year old cock
  • Two year old hen and cock
How many meiotic divisions are necessary for the formation of 100 grains of wheat?
  • 100
  • 125
  • 25
  • 50
Given below some steps of fish culture programme. In following steps identify A, B and C :
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  • A - Hatchling , B - sac fry, C - Fry
  • A - sac fry , B - fry , C - Hatchling
  • A - fry , B - sac fry , C - Fingerling
  • A - sac fry , B - Fry , C - fingerling

Which of the following statements are correct regarding tissue culture?
  • (A) It is a technique of maintaining and growing plant cells, tissues or organs on an artificial medium.
  • (B) Cellular totipotency is the ability of a somatic cell in tissue culture to produce a complete organism.
  • (C) Thousands of plants are produced through micropropagation in tissue culture.
  • (D) Culture media contains organic salts and desired enzymes for growth and development.
Which of the following is correct regarding plant breeding?
  • It involves the self-hybridization of plants.
  • A reference cultivator is compared with new selected breeds.
  • The germplasm is evaluated for the identification of desired characters.
  • Plant breeding is used to create invariable desired crops.
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