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MCQs

Total Questions : 131 | Page 8 of 14 pages
Question 71. How many million years ago did late cynodonts exist?
  1.    10
  2.    20
  3.    220
  4.    300
 Discuss Question
Answer: Option C. -> 220
Answer: (c).220
Question 72. How many mass extinctions have been documented in fossil history?
  1.    2
  2.    3
  3.    4
  4.    5
 Discuss Question
Answer: Option D. -> 5
Answer: (d).5
Question 73. How many million years ago did synapsids exist?
  1.    300
  2.    30
  3.    900
  4.    1000
 Discuss Question
Answer: Option A. -> 300
Answer: (a).300
Question 74. Mycorrhizae is scientific name for which of following?
  1.    root fungi
  2.    cone bearing plants
  3.    flowering plants
  4.    underground roots
 Discuss Question
Answer: Option A. -> root fungi
Answer: (a).root fungi
Question 75. Inner membranes of mitochondria have transport systems similar to those of
  1.    archaea
  2.    prokaryotes
  3.    eukaryotes
  4.    viruses
 Discuss Question
Answer: Option B. -> prokaryotes
Answer: (b).prokaryotes
Question 76. How many million years ago did early cynodonts exist?
  1.    100
  2.    200
  3.    260
  4.    300
 Discuss Question
Answer: Option C. -> 260
Answer: (c).260
Question 77. What is the full form of pH?
  1.    Positive hydrogen
  2.    Potential Hydrogen
  3.    Positron
  4.    Proton of hydrogen
 Discuss Question
Answer: Option B. -> Potential Hydrogen
Answer: (b).Potential Hydrogen
Question 78. Acids that lose a proton easily are weak acids.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 79. Which of the following is an example of amphoteric molecule?
  1.    Acetic acid
  2.    Malic acid
  3.    Sugars
  4.    Water
 Discuss Question
Answer: Option D. -> Water
Answer: (d).Water
Question 80. What is the concentration of pure water?
  1.    55.51 M
  2.    25.51 M
  3.    55 M
  4.    25 M
 Discuss Question
Answer: Option A. -> 55.51 M
Answer: (a).55.51 M

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