Plant structure and function

 

A

1 Name the parts of the plant shown in the drawing. 

2 Match the structures stem, leaf, root,

terminal bud, lateral bud to the following

B

functions:

   (a) produces carbohydrates

C

   (b) carries water to leaves

   (c) absorbs sunlight

   (d) continues growth in height

   (e) absorbs mineral salts

D

   (f) makes branches

   (g) anchors plant in soil

E

   (h) conducts food to roots

   (i) evaporates water 

   (j) produces new leaves

F

   (k) spaces out leaves

   (l) produces flowers

   (m) absorbs carbon dioxide

   (n) absorbs water.

3 The drawing represents a vertical section through a leaf x 200

   (a) Name the parts indicated by the letters

A

        A - E.

   (b) What differences can you see between

B

       the palisade cells and the spongy mesophyll cells

palisade cell

   (c) What is the function of C?

   (d) (i) Name the features represented in the

         diagram, which are thought to adapt the

spongy mesophyll cell

         leaf to its function in photosynthesis.

       (ii) Say how these features help to

        promote this process.

   (e) State three other structural features, not

C

         shown in the drawing, which are thought

D

         to be adaptations to the process of photo-

         synthesis in most leaves.

E

         Explain briefly how these features

         contribute to the efficiency of photosynthesis. 

4 Which of the following are most likely to be true? When the stomata are open, the leaf is

   (a) absorbing oxygen                        (d) giving off carbon dioxide

   (b) giving off water vapour               (e) giving off oxygen

   (c) absorbing carbon dioxide

5 (a) How many stomata are shown in this

        drawing of leaf epidermis?

0.1 mm

   (b) How many of the stomata are open?

   (c) How many are likely to be open at

        night?

   (d) What is the magnification of the

        drawing?

Self-assessment questions                                                                                                       6.02

Plant structure and function (continued)

6 (a) What process is responsible for the movement of carbon dioxide into a leaf?

   (b) In what conditions might the same process cause oxygen to enter a leaf?

7 The diagrams represent transverse sections through a root and a stem.

   (a) Say which one represents the stem and which one represents the root, giving your

         reasons.

   (b) Name the parts of these organs represented by the letters A-J.

	A

 

 

B

 

 

 

			Figure 1		Figure 2