Name ___________________________________________________________ Date _____________
Plant Structure and Growth Worksheet
1.	The diagram below shows a cross section of a stem. What is the structure labelled Y and one of its functions?

	Structure Y	Function	
A.	phloem	storage of water and starch	
B.	xylem	mechanical support	
C.	phloem	gas exchange	
D.	xylem	transport of sugars	
(Total 1 mark)
2.	Which structure is shown in the following image?
		
[Source: Ohio State University at Lima]
A.	A dicotyledon stem
B.	A monocotyledon stem
C.	A dicotyledon root
D.	A monocotyledon root
(Total 1 mark)
3.	What part of the human body is most similar in function to the spongy mesophyll layer in a leaf?
A.	Alveoli in the lungs
B.	Erythrocytes in the blood
C.	Villi in the small intestine
D.	Sweat glands in the skin
(Total 1 mark)
4.	Up to two additional marks are available for the construction of your answers.
(2)
	Explain the role of auxin in phototropism.
(8)
(Total 10 marks)

 
5.	Up to two additional marks are available for the construction of your answers.
(2) 
	Describe the differences in the structures of dicotyledonous plants and monocotyledonous plants.
(5)
 (Total 7 marks)

6.	Up to two additional marks are available for the construction of your answers.
(2)
	(a)	Draw a labelled diagram showing the tissues present in a dicotyledonous leaf.
(4)

(b)	Outline the light-dependent reactions of photosynthesis.
(6)

(c)	Explain the effect of light intensity and temperature on the rate of photosynthesis.
(8)
(Total 20 marks)

7.	What are the main structures in a bulb and their function?
A.	Flowers for sexual reproduction
B.	Enlarged roots for nutrient absorption from the soil
C.	Swollen leaf bases for food storage
D.	Thickened stems for water storage
(Total 1 mark)

8.	(a)	State two types of meristem found in plants.
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(1)
(b)	State two methods by which terrestrial plants support themselves.
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(1)
 (Total 2 marks)