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BIOLOGY MCQs

Total Questions : 1207 | Page 117 of 121 pages
Question 1161. . Prothrombin which helps in clotting of blood is released by
  1.    lymphocytes
  2.    erythrocytes
  3.    monocytes
  4.    blood platelets
 Discuss Question
Answer: Option D. -> blood platelets
Question 1162. . Plants growing on sand are called as
  1.    chasmophytes
  2.    oxylophytes
  3.    lithophytes
  4.    psammophytes
 Discuss Question
Answer: Option D. -> psammophytes
Question 1163. . Most of the red, blue and purple colours of plants are due to a pigment called
  1.    anthocyanin
  2.    carotene
  3.    chlorophyll
  4.    xanthophylls
 Discuss Question
Answer: Option A. -> anthocyanin
Question 1164. . Plants developing in dry conditions are
  1.    xerophytes
  2.    mesophytes
  3.    lithophytes
  4.    hydrophytes
 Discuss Question
Answer: Option A. -> xerophytes
Question 1165. . Ramapithecus and Cro-Magnon man are considered
  1.    ancestors of modern man
  2.    ancestors of monkey
  3.    ancestors of lion
  4.    None of the above
 Discuss Question
Answer: Option A. -> ancestors of modern man
Question 1166. . Normal adult human male has
  1.    10 gram of haemoglobin/100 gram of blood
  2.    14 gram of haemoglobin/100 gram of blood
  3.    18 gram of haemoglobin/100 gram of blood
  4.    24 gram of haemoglobin/100 gram of blood
 Discuss Question
Answer: Option B. -> 14 gram of haemoglobin/100 gram of blood
Question 1167. . Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called
  1.    flavoxanthin
  2.    melanin
  3.    carotene
  4.    Xanthophyll
 Discuss Question
Answer: Option B. -> melanin
Question 1168. . Plants wilt due to excess of
  1.    transpiration
  2.    photosynthesis
  3.    absorption
  4.    None of these
 Discuss Question
Answer: Option A. -> transpiration
Question 1169. . Monotremes are unique mammals because they
  1.    posses hair
  2.    give birth to live young
  3.    secret milk in a pouch
  4.    lay eggs
 Discuss Question
Answer: Option D. -> lay eggs
Question 1170. .  Radical vascular bundles are those in which
  1.    xylem is surrounded by phloem
  2.    phloem is surrounded by xylem
  3.    xylem and phloem occur on the same radius
  4.    xylem and phloem occur on the different radii
 Discuss Question
Answer: Option D. -> xylem and phloem occur on the different radii

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