CIE AS Biology

Topic Questions

Syllabus Edition

First teaching 2020

Last exams 2024

|

7.1 Structure of Transport Tissues

1a
Sme Calculator
2 marks

Fig. 1 below shows the distribution of vascular tissue in two different parts of a plant.

8--q4-root-and-stem

Fig. 1

Name the tissues present in each of the regions labelled 1-4.

1b
Sme Calculator
2 marks

The distribution of tissues shown by the regions labelled 1 and 2 is different to that shown by the regions labelled 3 and 4 in Fig. 1.

Identify the part of a plant in which the distribution of vascular tissue is correctly represented by:

(i)

Regions 1 and 2.

[1]

(ii)
Regions 3 and 4.

[1]

1c
Sme Calculator
4 marks

Fig. 2 below shows a student's attempt at a low-power drawing made from a microscope slide.

untitled-1

Fig. 2

Identify four errors in the student's low-power drawing in Fig. 2

1d
Sme Calculator
2 marks

The cambium, labelled on Fig. 2, is a region that contains plant stem cells.

Define the term stem cell.

Did this page help you?

2a
Sme Calculator
3 marks

Fig. 1 below shows a leaf cross-section tissue map.

cross-section

Fig. 1

Identify the structures labelled Xand Z.

2b
Sme Calculator
2 marks

Give the roles of structures X and Y.

2c
Sme Calculator
4 marks

Explain two ways in which structure X is adapted to carry out its function.

2d
Sme Calculator
1 mark

Fig. 1 is an example of a low-power plan.

State how the appearance of a high-power plan would differ from Fig. 1.

Did this page help you?

3a
Sme Calculator
4 marks

Fig. 1 shows a high-power drawing of a section of a plant when viewed under a microscope.

section-of-a-plant

Fig. 1

(i)

Identify the part of a plant from which the drawing is taken.

[1]

(ii)
Identify the structures labelled P, Q and R.

[3]

3b
Sme Calculator
2 marks

As stated in part (a), Fig. 1 is a high-power drawing.

(i)

State one feature that is visible in Fig. 1 that indicates that this is a high-power drawing.

[1]

(ii)

State one feature that is absent from Fig. 1 that we might expect to see in a high-power drawing.

[1]

3c
Sme Calculator
2 marks

Chloroplasts are not visible in Fig. 1.

Suggest why this might be the case.

3d
Sme Calculator
2 marks

Phloem is a type of transport tissue found in plants.

Explain why plants need transport tissues.

Did this page help you?

1a2 marks

Fig. 1 shows the structure of plasmodesmata, channels that exist between some types of plant cell that allow the transport of substances.

7-1-fig-3-1

Fig. 1

Suggest why plant cells need plasmodesmata while animal cells do not.

1b3 marks

Within the cytoplasm of the plasmodesmata is a structure known as the desmotubule; a column of specialised endoplasmic reticulum that connects to the cell surface membrane via a series of actin and myosin proteins. Actin and myosin proteins are the contractile elements of animal muscle cells.

Suggest a possible function of the desmotubule.

1c2 marks

State the location of plasmodesmata in the vascular tissue of plants and describe its role there.

1d3 marks

Other than the role of plasmodesmata described in part (c), give three substances that might move from one cell to another via plasmodesmata.

Did this page help you?

2a
Sme Calculator
2 marks

Fig. 1 shows a cross-section through a leaf viewed at a magnification of x250.

7-1-fig-2-1

Fig. 1

Calculate the actual size of a palisade mesophyll cell shown in Fig. 1.

Show your working and include appropriate units.

2b4 marks

Contrast the structures of the tissues labelled P and Q in Fig. 1.

2c6 marks

A student viewed a section of plant tissue under a light microscope. The tissue viewed is shown in Fig. 2.

7-1-fig-2-2

Fig. 2

Draw a low-power plan diagram of the plant tissue shown in Fig. 2.

Did this page help you?

3a
Sme Calculator
6 marks

The vascular system of plants has been likened to the circulatory system in animals, such as humans. 

Evaluate this statement. 

3b
Sme Calculator
2 marks

Cellulose is the most abundant organic polymer on Earth.

Use your knowledge of plant structure to suggest which compound ranks number 2 in the list of abundant organic polymers.

Give a reason for your choice.

3c
Sme Calculator
2 marks

The compound referred to in part (b) is highly hydrophobic in nature.

Explain how this helps it to perform one of its functions.

Did this page help you?

1a3 marks

Fig. 1 shows a cross-section through a mature buttercup root taken using a light microscope under high power.

7-1-fig-1-1

Fig. 1

Identify X, Y, and Z.

1b4 marks

Explain how the structure of tissue X is related to its function.

1c2 marks

Water moves along structure X in a continuous column.

Explain how the structure of water molecules enables this.

Did this page help you?

2a3 marks

Fig. 1 shows a transverse section of xylem tissue viewed under a light microscope.

7-1-fig-4-1

Fig. 1

Identify and explain an adaptation of xylem vessels visible in Fig. 1.

2b3 marks

Fig. 1 was generated using a light microscope.

Explain why light microscopes have a lower maximum magnification than electron microscopes.

2c5 marks

Xylem vessels are distributed differently in different parts of plants.

Describe the distribution of xylem tissue in the stems, roots, and leaves of dicotyledonous plants.

Did this page help you?

3a
Sme Calculator
1 mark

Meristematic tissue is found in the growing regions of plants, such as shoot tips. Meristematic cells have a similar role to stem cells in animals.

Fig. 1 shows some of the stages in the formation of a mature phloem sieve tube element and companion cells from a meristematic cell.

gOrdV5cE_fig4-1-qp-mayjune-2019-9700-21

Fig. 1

Cells E and F in Fig. 1 are daughter cells produced when the meristematic cell divides in the shoot tip.

Explain why it is important that one of the daughter cells (cell E) is a meristematic cell.

3b
Sme Calculator
3 marks

Complete Table 1 to describe the changes that are shown in Fig. 1 between stages:

F and G
G and H
H and J.

Table 1

stages description
F and G  
G and H  
H and J  

3c
Sme Calculator
4 marks

Explain how the structure of a mature sieve tube element is related to its function.

3d
Sme Calculator
2 marks

Describe the functions of companion cells in transport in the phloem.

Did this page help you?