FINISH

1.  A man bought a potted plant. After a few days,he found the leaves turned yellow. He then bought some liquid fertilizer and added a whole bottle of it to the soil around the plant.

a) What chemical in the leaf cells contributes to green colour of leaves? Name two production of this chemical. { 3marks }

b) The leaves drooped and the stems bent the next day after the addition of fertilizer. What caused this?{ 3marks }

[[i] 本帖最後由 癲穎 於 2009-9-8 16:05 編輯 [/i]]

問f.4 bio.
1.  A man bought a potted plant. After a few days,he found the leaves turned yellow. He then bought some liquid fertilizer and added a whole bottle of it to the soil around the plant.

a) What chemical in the leaf cells contributes to green colour of leaves? Name two production of this chemical. { 3marks }
two product or production?

magnesium in chlorophyll

b) The leaves drooped and the stems bent the next day after the addition of fertilizer. What caused this?{ 3marks }

i guess it is because the excess liquid fertilizer might prevent absorption and breathing of air of root and cause the plant sufocated and wilt