Biology - 02

01. Our major foods, fibres, spices, fruits and beverage crops are

  • 1flowering plants
  • 2gymnosperms plants
  • 3pteridophytes
  • 4bryophytes
Answer:- 1
Explanation:-

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02. Organic Substances which, in very small amounts, control growth and development called

  • 1vitamins
  • 2hormones
  • 3enzymes
  • 4None of the above
Answer:- 1
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03. Radioactivity is a phenomenon of the spontaneous emission of

  • 1protons (alpha particles)
  • 2electrons (beta particles)
  • 3gamma rays (short wave electromagnetic waves)
  • 4All of the above
Answer:- 1
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04. Night blindness is cause by lack of which vitamin?

  • 1Vitamin A
  • 2Vitamin B
  • 3Vitamin C
  • 4Vitamin D
Answer:- 1
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05. Norepinephrine increases

  • 1respiration
  • 2urine production
  • 3saliva production
  • 4blood pressure
Answer:- 1
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06. Pigmentation of skin is due to

  • 1lymphocytes
  • 2monocytes
  • 3leucocytes
  • 4melanocytes
Answer:- 1
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07. On which of the following plants did Gregor Mendal perform his classical experiment?

  • 1Gram
  • 2Maize
  • 3Pea
  • 4Wheat
Answer:- 1
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08. Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?

  • 1Exact concentration of solution is not given
  • 2Character of semi permeable membrane is not given
  • 3The flow of solution is not possible through semi permeable membrane
  • 4All are incorrect
Answer:- 1
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09. Plant have ____ while animals lack it.

  • 1starch
  • 2cellulose
  • 3protein
  • 4fat
Answer:- 1
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10. Plant bends towards the source of light on account of the movement of curvature known as

  • 1geotropism
  • 2thigmotropism
  • 3chemotropism
  • 4phototropism
Answer:- 1
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