GS Biology Questions and Answers

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Q141
Photo-oxidation is
  • A photorespiration
  • B photolysis
  • C light and oxygen induced breakdown
  • D All of the above
Answer: Option D
Q142
Plants absorb most part of water needed by them through their
  • A embryonic zone
  • B growing point
  • C root hairs
  • D zone of elongation
Answer: Option C
Q143
Placenta is the structure formed
  • A by the union of foetal and uterine tissue
  • B by foetus only
  • C by fusion of germ layers
  • D None of these
Answer: Option A
Q144
Potato is a modified form (outgrowth) of
  • A root
  • B stem
  • C fruit
  • D leaf
Answer: Option B
Q145
Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called
  • A flavoxanthin
  • B melanin
  • C carotene
  • D xanthopny II
Answer: Option B
Q146
Normal adult human male has
  • A 10 gram of haemoglobin/100 gram of blood
  • B 14 gram of haemoglobin/100 gram of blood
  • C 18 gram of haemoglobin/100 gram of blood
  • D 24 gram of haemoglobin/100 gram of blood
Answer: Option B
Q147
Radical vascular bundles are those in which
  • A xylem is surrounded by phloem
  • B phloem is surrounded by xylem
  • C xylem and phloem occur on the same radius
  • D xylem and phloem occur on the different radii
Answer: Option D
Q148
Plant have ____ while animals lack it.
  • A starch
  • B cellulose
  • C protein
  • D fat
Answer: Option B
Q149
Night blindness is cause by lack of which vitamin?
  • A Vitamin A
  • B Vitamin B
  • C Vitamin C
  • D Vitamin D
Answer: Option A
Q150
Radioactivity is a phenomenon of the spontaneous emission of
  • A protons (alpha particles)
  • B electrons (beta particles)
  • C gamma rays (short wave electromagnetic waves)
  • D All of the above
Answer: Option D

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