Biofertilizers And Antibiotics Test

Biofertilizers And Antibiotics

This is online test 02 for CBSE class 12 Biology Microbes in Human Welfare (Biofertilizers and antibiotics).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Rotenone is
  • A
    A natural insecticide
    Correct
  • B
    An insect hormone
  • C
    A bio herbicide
  • D
    A natural herbicide
2
Symbiotic association of fungi with plant are called as
  • A
    Lichens
  • B
    Mycovectro
  • C
    Mycobacteria
  • D
    Mycorrhiza
    Correct
3
Agriculture by using only biofertilizers is called
  • A
    Organic farming
    Correct
  • B
    Inorganic farming
  • C
    Composting
  • D
    Manuring
4
Which one of the following is not used in organic farming?
  • A
    Glomus
  • B
    Oscillatoria
  • C
    Earthworm
  • D
    Snail
    Correct
5
One of the free-living anaerobic nitrogen-fixer is
  • A
    Azotobacter
  • B
    Rhizobium
  • C
    Beijerinckia
  • D
    Rhodospirillum
    Correct
6
Organism like Escherichia coli and Chlamydia trachomatis fall into which domain?
  • A
    Bacteria
    Correct
  • B
    Archaea
  • C
    Animalia
  • D
    Eukarya
7
Which one of the following is used as biological insecticide?
  • A
    Silkmoth
  • B
    Tiger beetle
    Correct
  • C
    Caterpillar
  • D
    Mazra Poka
8
The discovery that led to development of first antibiotic was made by
  • A
    Pauling
  • B
    Pasteur
  • C
    Flemming
    Correct
  • D
    Jenner
9
Which one of the following plant is commonly used as green manure?
  • A
    Crotalaria juncea
    Correct
  • B
    Cassia fistula
  • C
    Dalbergia sissoo
  • D
    Acacia nilotica
10
The biological control of agricultural pests, unlike chemical control is
  • A
    Toxic
  • B
    Very expensive
  • C
    Self-perpetuating
    Correct
  • D
    Polluting