Organising animals and plants test PDF

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animals and plants test...

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B4 Organising Exam-style questions animals and plants Name ...................................................................... 0

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Blood is part of the circulatory system.

Give one function of white blood cells. (1 mark)

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Which of the following is a feature of platelets?

Tick () one box. They have a nucleus. They contain haemoglobin. (1 mark)

They are small fragments of cells.

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Urea is transported by the blood plasma from where it is made to where the urea is excreted.

Complete the following sentence. Blood plasma carries urea from where it is made in the to the urea is removed from the blood.

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where the (2 marks)

Figure 1 shows a section through the human heart. Figure 1

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This resource sheet may have been changed from the original.

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B4 Organising Exam-style questions animals and plants Name ......................................................................

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Structure X is a valve. If valve X stops working, it may need to be replaced. A scientist is designing a new heart valve. The scientist knows that the valve must be the correct size to fit in the heart. Suggest two other factors the scientist needs to consider so that the newly designed valve works effectively in the heart. 1

2 (2 marks) AQA specimen paper 0

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Gas exchange takes place inside the lungs. Figure 2 shows an alveolus in the lungs. Figure 2

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Look at Figure 2. Identify gas A.

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Explain two ways an alveolus is adapted to gas exchange.

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www.oxfordsecondary.co.uk/acknowledgements

This resource sheet may have been changed from the original.

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B4 Organising Exam-style questions animals and plants Name ......................................................................

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(4 marks)

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Emphysema is a type of lung disease. It occurs when the alveoli walls break down and join together, forming larger air spaces than normal. This reduces the efficiency of gas exchange. Suggest why a person with emphysema finds it difficult to exercise.

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Figure 3 shows apparatus you could use to mount a piece of leaf epidermis for examination under a microscope.

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Figure 3

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Describe how you would use A, B, C, and D to mount a piece of leaf epidermis for examination under a microscope.

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www.oxfordsecondary.co.uk/acknowledgements

This resource sheet may have been changed from the original.

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B4 Organising Exam-style questions animals and plants Name ......................................................................

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A student used a grid on a microscope to estimate the number of stomata in some leaf epidermis.

Figure 4 shows four of the grid squares the student observed. Each grid has an area of 0.0001 mm2 Figure 4

Calculate the mean number of stomata per grid square.

Mean number of stomata per grid square

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(2 marks)

Calculate the mean number of stomata per 1 mm2 of leaf epidermis.

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www.oxfordsecondary.co.uk/acknowledgements

This resource sheet may have been changed from the original.

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B4 Organising Exam-style questions animals and plants Name ......................................................................

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Mean number of stomata per 1 mm2 (2 marks) 0

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Describe the role of guard cells in preventing water loss.

(2 marks)

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Each side of a grid square has a length of approximately 0.01 mm.

Use this information to estimate the length of a guard cell.

Estimated length of guard cell 

mm

(2 marks)

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A group of students looked at stomata on four different species of plant, W, X, Y, and Z.

The students estimated the number of stomata per cm2 on the upper and lower surfaces of the leaves of the four species. The results are shown in the Table 1. Table 1 Plant species

Estimated number of stomata per cm2 of leaf surface Upper surface of leaf

Lower surface of leaf

W

4000

28 000

X

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800

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www.oxfordsecondary.co.uk/acknowledgements

This resource sheet may have been changed from the original.

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B4 Organising Exam-style questions animals and plants Name ......................................................................

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Y

8500

15 000

Z

8000

26 000

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Suggest which plant species, W, X, Y, or Z, lives in a dry region. Justify why you have chosen this species.

(3 marks)

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All four species have more stomata on the lower surface of their leaves than on the upper surface.

Suggest how this feature improves the chances of the survival for the plants.

(2 marks)

© Oxford University Press 2016

www.oxfordsecondary.co.uk/acknowledgements

This resource sheet may have been changed from the original.

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