Q.11)-Plant development is influenced by
  • quality of light only
  • quality and quantity of light
  • quality and duration of light
  • quality, quantity and duration of light
Q.12)-Photosynthesis takes place faster in
  • yellow light
  • white light
  • red light
  • darkness
Q.13)-Other than spreading malaria, anopheles mosquitoes are also vectors of
  • dengue fever
  • filariasis
  • encephalitis
  • yellow fever
Q.14)-Plants that grow in saline water are called
  • halophytes
  • hydrophytes
  • mesophytes
  • thallophytes
Q.15)-Pyorrhoea is a disease of the
  • nose
  • gums
  • heart
  • lungs
Q.16)-O2 released in the process of photosynthesis comes from
  • CO2
  • water
  • sugar
  • pyruvic acid
Q.17)-Phloem is a tissue found in
  • reproductive organs of animals
  • plants
  • insects
  • mammals
Q.18)-N2 content is kept constant in the biosphere due to
  • N2 fixation
  • industrial pollution
  • nitrogen cycle
  • absorption of N2
Q.19)-Plants developing in dry conditions are
  • xerophytes
  • mesophytes
  • lithophytes
  • hydrophytes
Q.20)-Plants growing on sand are called as
  • chasmophytes
  • oxylophytes
  • lithophytes
  • psammophytes