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State PSC Science & Technology — practice questions — page 9

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 241–270 of 311.

A cereal crop usually takes how long to mature?Read the answer and worked solution →A combine is a machine that works as both harvester and:Read the answer and worked solution →Small farmers separate grain from chaff by:Read the answer and worked solution →Catch the kharif cropsRead the answer and worked solution →Pop the farm toolsRead the answer and worked solution →Run the farming calendarRead the answer and worked solution →Slice the farming wordsRead the answer and worked solution →Manure or fertiliserRead the answer and worked solution →Sort the farm methodsRead the answer and worked solution →Type the numberRead the answer and worked solution →Crop production bingoRead the answer and worked solution →Who was the earliest to classify plants into trees, shrubs and herbs on a scientific basis?Read the answer and worked solution →Who proposed the Five Kingdom Classification in 1969?Read the answer and worked solution →Bacteria are the sole members of which kingdom?Read the answer and worked solution →Rod-shaped bacteria are called:Read the answer and worked solution →Archaebacteria living in extremely salty areas are called:Read the answer and worked solution →Which archaebacteria in the gut of cows produce methane from dung?Read the answer and worked solution →Nostoc and Anabaena fix atmospheric nitrogen in specialised cells called:Read the answer and worked solution →The smallest known living cells, which completely lack a cell wall, are:Read the answer and worked solution →All single-celled eukaryotes are placed in which kingdom?Read the answer and worked solution →Diatom cell walls are indestructible because they are embedded with:Read the answer and worked solution →Gritty deposits of diatom cell walls, used in polishing and filtering oils, are called:Read the answer and worked solution →Red tides that kill fish are caused by rapid multiplication of red:Read the answer and worked solution →Euglenoids lack a cell wall and instead have a flexible protein-rich layer called the:Read the answer and worked solution →The parasite causing sleeping sickness, a flagellated protozoan, is:Read the answer and worked solution →The network of thread-like hyphae that forms a fungal body is called the:Read the answer and worked solution →A fungus living with the roots of higher plants forms an association called:Read the answer and worked solution →The wheat rust fungus Puccinia and the mushroom Agaricus belong to which fungal class?Read the answer and worked solution →Ascomycetes are commonly known as:Read the answer and worked solution →Who first recognised viruses as the cause of tobacco mosaic disease in 1892?Read the answer and worked solution →

Worked practice questions

A cereal crop usually takes how long to mature?

  1. 9 to 12 months
  2. 3 to 4 months
  3. 1 to 2 months
  4. 6 to 8 months
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Correct answer: B. 3 to 4 months

1. Harvesting follows maturity. 2. Cereals mature in 3 to 4 months. 3. Harvest festivals mark the end. _Source: syllabus Science, Chapter 1, Crop Production and Management._

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A combine is a machine that works as both harvester and:

  1. Sprinkler
  2. Leveller
  3. Thresher
  4. Seed drill
Show answer and solution

Correct answer: C. Thresher

1. Threshing separates grain from chaff. 2. A combine harvests and threshes. 3. Small farmers winnow instead. _Source: syllabus Science, Chapter 1, Crop Production and Management._

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Small farmers separate grain from chaff by:

  1. Ploughing
  2. Levelling
  3. Sprinkling
  4. Winnowing
Show answer and solution

Correct answer: D. Winnowing

1. Wind carries the lighter chaff away. 2. This is winnowing. 3. Large farms use a combine. _Source: syllabus Science, Chapter 1, Crop Production and Management._

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