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State PSC Science & Technology — practice questions — page 4

Explore 311 free Science & Technology questions in State PSC Science. Open each question or exercise to read its content, reference answers and available explanation.

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Science & Technology questions and exercises with answers

Showing questions 91–120 of 311.

Baculoviruses used in biocontrol mostly belong to the genus:Read the answer and worked solution →Rhizobium fixes atmospheric nitrogen in the root nodules of:Read the answer and worked solution →The mycorrhizal fungus Glomus absorbs which nutrient from soil for the plant?Read the answer and worked solution →Catch the biofertilisersRead the answer and worked solution →Pop the sewage treatment wordsRead the answer and worked solution →Run the microbe productsRead the answer and worked solution →Slice the microbe wordsRead the answer and worked solution →Bacterium or fungusRead the answer and worked solution →Sort where microbes serveRead the answer and worked solution →Type the numberRead the answer and worked solution →Microbes in welfare bingoRead the answer and worked solution →India and China hold more than what share of the world's livestock population?Read the answer and worked solution →Mating closely related animals of the same breed for 4 to 6 generations is:Read the answer and worked solution →Continued close inbreeding reduces fertility and productivity, a problem called:Read the answer and worked solution →Hisardale, a new sheep breed developed in Punjab, is a cross of Bikaneri ewes and:Read the answer and worked solution →In MOET, a hormone with FSH-like activity makes a cow produce how many eggs per cycle?Read the answer and worked solution →The most common honeybee species reared in India is:Read the answer and worked solution →Hilsa, sardines, mackerel and pomfrets are examples of:Read the answer and worked solution →Recorded evidence of plant breeding dates back to:Read the answer and worked solution →The entire collection of plants or seeds having all diverse alleles for all genes in a crop is its:Read the answer and worked solution →Agriculture accounts for about what share of India's GDP and employs nearly what share of the population?Read the answer and worked solution →Between 1960 and 2000, wheat production rose from 11 million tonnes to:Read the answer and worked solution →Semi-dwarf wheat was developed in Mexico by Nobel laureate:Read the answer and worked solution →Sonalika and Kalyan Sona, introduced in 1963, are high-yielding varieties of:Read the answer and worked solution →Semi-dwarf rice varieties in India were derived from IR-8, developed at:Read the answer and worked solution →Jaya and Ratna are better-yielding semi-dwarf varieties of:Read the answer and worked solution →Saccharum barberi of north India was crossed with which south Indian species to get better sugar cane?Read the answer and worked solution →Resistance to yellow mosaic virus in bhindi from a wild species gave the variety:Read the answer and worked solution →Breeding crops with higher vitamins, minerals, protein or healthier fats is called:Read the answer and worked solution →Producing 1 kg of meat by animal farming takes how much grain?Read the answer and worked solution →

Worked practice questions

Baculoviruses used in biocontrol mostly belong to the genus:

  1. Retrovirus group
  2. Nucleopolyhedrovirus
  3. Human adenovirus
  4. Common rhinovirus
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Correct answer: B. Nucleopolyhedrovirus

1. They attack insects and arthropods. 2. Most are Nucleopolyhedrovirus. 3. They spare plants, mammals, birds and fish. _Source: syllabus Biology, Chapter 10, Microbes in Human Welfare._

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Rhizobium fixes atmospheric nitrogen in the root nodules of:

  1. Wheat crop fields
  2. Cotton plantations
  3. Leguminous plants
  4. Paddy rice fields
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Correct answer: C. Leguminous plants

1. It is a symbiotic association. 2. Legume roots carry Rhizobium nodules. 3. Azotobacter fixes nitrogen free-living in soil. _Source: syllabus Biology, Chapter 10, Microbes in Human Welfare._

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The mycorrhizal fungus Glomus absorbs which nutrient from soil for the plant?

  1. Nitrogen
  2. Potassium
  3. Calcium
  4. Phosphorus
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Correct answer: D. Phosphorus

1. Glomus forms mycorrhiza with roots. 2. It passes phosphorus to the plant. 3. Plants also gain drought and salinity tolerance. _Source: syllabus Biology, Chapter 10, Microbes in Human Welfare._

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