Q.21)-Plant have ____ while animals lack it.
  • starch
  • cellulose
  • protein
  • fat
Q.22)-Pigmentation of skin is due to
  • lymphocytes
  • monocytes
  • leucocytes
  • melanocytes
Q.23)-Night blindness is cause by lack of which vitamin?
  • Vitamin A
  • Vitamin B
  • Vitamin C
  • Vitamin D
Q.24)-Our major foods, fibres, spices, fruits and beverage crops are
  • flowering plants
  • gymnosperms plants
  • pteridophytes
  • bryophytes
Q.25)-Movements due to light are shown by
  • flowering plants
  • lower plants
  • all land plants
  • all the plants
Q.26)-Rain water helps to increase the ____ to some extent.
  • phosphorous contents
  • nitrogen contents
  • calcium contents
  • potash contents
Q.27)-Plants are killed in winter by frost
  • because of desiccation and mechanical damage to the tissues
  • because no photosynthesis takes place at such low temperature
  • because respiration ceases at such low temperature
  • because there is no transpiration
Q.28)-Pulses are a good source of
  • carbohydrates
  • fats
  • proteins
  • vitamins
Q.29)-Nymph is the name of young one of
  • butterfly
  • beetle
  • housefly
  • cockroach
Q.30)-Plants that grow under average temperature and moisture are called
  • halophytes
  • hydrophytes
  • mesophytes
  • xerophytes