A researcher studying woodland plants drew Fig. 1 after finding a mistletoe plant attached to an apple tree branch. The mistletoe has green leaves but sends...
Question 1 Report
A researcher studying woodland plants drew Fig. 1 after finding a mistletoe plant attached to an apple tree branch. The mistletoe has green leaves but sends root-like structures into the branch. These structures take water and mineral ions from the tree's tissues. The apple tree also needs water for its own leaf cells.
(a) Identify the relationship between the mistletoe and the apple tree. [1]
(b) Explain why mistletoe is not a complete parasite. [2]
(c) Use Fig. 1 to explain one effect of heavy mistletoe growth on the apple tree. [2]
Answer Details
(a) Parasitism [1] (b) Mistletoe has chlorophyll / green leaves [1]; makes its own glucose by photosynthesis [1] (c) It removes water / mineral ions from the tree [1]; tree has less for photosynthesis, growth or fruit production [1]
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