14. When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies
    because: [CSAT -IAS 2011]
      (a) water from soil cannot rise to aerial parts
      (b) roots are starved of energy
      (c) tree is infected by soil microbes
      (d) roots do not receive oxygen for respiration
Ans: (a)
15. Which one among the following animal tissues transports hormones and heat and maintains water balance? [CDS
    2010]
      (a) Connective tissue
      (b) Muscular tissue
      (c) Blood
      (d) Nervous tissue
Ans: (b)
16. Which one among the following plants cannot be multiplied by cuttings? [CDS 2010]
      (a) Rose
      (b) Bryophyllum
      (c) Banana
      (d) Marigold
Ans: (b)
17. Cattle are capable of digesting cellulose present in the grass and / or fodder that they eat. This ability is attributed
    to the [CDS 2010]
      (a) presence of cellulose degrading bacteria in the rumen
      (b) production of cellulose by the cattle rumen
      (c) acids present in the rumen
      (d) prolonged retention of cellulose in the rumen
Ans: (a)
18. Why are pregnant women recommended substantial intake of green leafy vegetables in their diet, especially in the
    1st trimester? [CDS 2010]
      (a) They are a rich source of chlorophyll
      (b) They are a rich source of lecithin
      (c) They are a rich source of folic acid which is required for DNA synthesis
      (d) They are a rich source of essential fatty acids required for cell anabolism
Ans: (d)
19. The flowers plants have been kept under:
      (a) creptogams
      (b) phanrogarns
      (c) bryophytes
      (d) tredophytes
Ans: (b)
20. The non-flowers plants have been kept under:
      (a) creptogams
      (b) phanrogams
      (c) bryophytes
      (d) tredophytes
Ans: (a)
21. As usual shape of bacteria is :
      (a) rod shaped
      (b) round
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