(3) root followed by ‘shoot’ tends to be more acceptable than
‘stem’
(5) the ‘chemistrical’ answer to this question is too ‘chimp’ to
a Primary Level student. Poor boy, hope you did not get confused
and lost insterest in Science.
I think the acceptable answer is quite the same as using boiled
water to rear fish,... to put it simply,... ..’boiled water
contains no oxygen and other elements which the plants need to grow
well’. Just like we eat food whithout the vitamins. We may still
live, but not healthy.
Hope this shed more light to your doubts.