﻿THE 
  SEED 
  PLANTS 
  307 
  

  

  PROBLEMS 
  

  

  1. 
  In 
  what 
  ways 
  are 
  the 
  seed 
  plants 
  the 
  most 
  complex 
  of 
  all 
  plants? 
  

  

  2. 
  What 
  different 
  kinds 
  of 
  structures 
  in 
  various 
  seed 
  plants 
  may 
  

   remain 
  dormant 
  throughout 
  drought 
  or 
  winter, 
  and 
  later 
  continue 
  the 
  

   growth 
  of 
  the 
  individual 
  plants 
  to 
  which 
  they 
  belong? 
  

  

  3. 
  Shew 
  ten 
  ways 
  in 
  which 
  the 
  seed-plant 
  habit 
  of 
  storing 
  food 
  in 
  

   seeds 
  and 
  elsewhere 
  is 
  important 
  to 
  industries. 
  What 
  four 
  plants 
  are 
  

   most 
  valuable 
  for 
  their 
  stored 
  food? 
  

  

  4. 
  What 
  plant 
  products 
  are 
  being 
  used 
  as 
  substitutes 
  for 
  animal 
  

   products, 
  as 
  cottolene 
  for 
  lard, 
  etc. 
  ? 
  Are 
  there 
  good 
  reasons 
  against 
  

   such 
  substitution 
  ? 
  

  

  5. 
  How 
  may 
  man 
  vary 
  the 
  amount 
  or 
  quality 
  of 
  food 
  stored 
  in 
  

   plants 
  ? 
  

  

  6. 
  What 
  cases 
  are 
  there 
  in 
  which 
  man 
  has 
  varied 
  plants 
  until 
  they 
  

   would 
  probably 
  be 
  unable 
  to 
  maintain 
  themselves 
  in 
  nature 
  if 
  unpro- 
  

   tected 
  ? 
  

  

  7. 
  What 
  is 
  meant 
  by 
  the 
  statement 
  that 
  the 
  angiosperms 
  are 
  the 
  

   youngest 
  and 
  most 
  successful 
  group 
  of 
  plants? 
  

  

  