SAT - Science - Biology - Agriculture and Economic Importance of Plants and Animals

Question - 1

A water fern, which is used as a green manure in rice fields, is

  • A Salvinia
  • B Mucor
  • C Aspergillus
  • D Azolla

Question - 2

Green manure plants used by farmers mainly belongs to?

  • A Compositae
  • B Legurninosae
  • C Solanaceae
  • D Poaceae

Question - 3

Major food crops of thej"orld belongs to

  • A Leguminosae
  • B Granineae
  • C Solanaceae
  • D Cruciferae

Question - 4

The desired varieties of economically useful crops are raised by

  • A Vernalisation
  • B Mutation
  • C Natural selection 
  • D Hybridisation

Question - 5

An organism used as a biofertilizer for raising soyabean crop is

  • A Nostoc
  • B 4Zobacter
  • C Azospirillum
  • D Rhizobium

Question - 6

Necrosis in crops is due to deficiency of

  • A Ca,K,S and Mo
  • B N, K, Sand Mo
  • C N, S, Fe and Zn
  • D Mg, S, Mn and Ca

Question - 7

Which one of the following is commonly used in transfer of foreign DNA into crop plants?

  • A Penicillium
  • B Trichoderma
  • C Clostridium
  • D Agrobacterium tumefaciens

Question - 8

Breeding crops with higher levels of minerals, vitamins or higher protein and healthier fats is called?

  • A Micropropagation
  • B Somatic hybridization
  • C Biforification
  • D Biomagnification

Question - 9

Which one of the following is not a biofertilizer

  • A Mycorrhiza
  • B Agrobacterium
  • C Rhizobium
  • D Nostoc

Question - 10

A transgenic food crop which may help in solving the problem of night blindness in developing countries is

  • A Golden Rice
  • B Flavr savr tomatoes
  • C Bt soybean
  • D Stralink maize
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