Class IX

Disadvantage of fats is
  1. efficient source of energy
  2. effective insulative material
  3. reduction in rate of heat loss
  4. solvent for vitamins
An increase in water potential refers to
  1. more osmotic pressure
  2. a drop in osmotic pressure
  3. more active transport
  4. excessive selective reabsorption
Conservation of resources can be tackled through
  1. human population control
  2. reducing pollution
  3. increasing use of resources
  4. both A and B
Transformation method of plants and animals in which plants and animals are given shocks is known as
  1. microinjection
  2. genome breeding
  3. electroporation
  4. genome engineering
Micropyle is the
  1. male gamete formed by generative nucleus
  2. pollen tube formed through vegetative nucleus
  3. opening in wall of ovule
  4. enzyme secreted by pollen tube to dissolve stigma and style
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