Class XI

Micronutrients which is component of all organic compounds but not obtained from soil
  1. Magnesium
  2. Magnesium
  3. Nitrogen
  4. Carbon
Main function of Nickel (Ni2+) in leaves and root is
  1. Metabolism of urea and ureides
  2. Activates enzymes
  3. Cytochrome oxidase
  4. Amylase and anion-cation balance
Which two minerals are not needed by the majority of plants but very much needed by almost all animals?
  1. Carbon and Calcium
  2. Sodium and Magnesium
  3. Oxygen and Nitrogen
  4. Sodium and Iodine
The autotrophs that do not use solar energy for synthesis of food are called
  1. Photoautotrophs
  2. Hydrotrophs
  3. Bacteriotrophs
  4. Chemoautotrophs
Element involved in the synthesis of cell wall and storage material are called
  1. Constructive elements
  2. Framework elements
  3. Secondary elements
  4. Essential elements
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