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