Class IX

Minimum time required between blood donations is
  1. 1 month
  2. 1 month
  3. 6 months
  4. 9 months
Blood pressure required for ultrafiltration is provided through
  1. a simple mechanical process
  2. afferent arteriole
  3. efferent arteriole
  4. heart beat
During oxygen (O2) debt, lactic acid (C3H6O3) is removed from
  1. liver
  2. muscles
  3. lungs
  4. mucus
Apple fruit is formed from
  1. a superior ovary
  2. an inferior ovary
  3. stamen
  4. petals of flower
Interaction and interdependence of plants and animals in a certain place is known as
  1. ecological niche
  2. ecological community
  3. ecological habitat
  4. both A and B
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LKG - 12th

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