7AB Markscheme

End of Unit Test Mark Scheme 7AB Question

Part

Level Answer

Mark scheme

1

3

One from: reproduction, sensitivity, growth, respiration, excretion, nutrition.

1 mark

2

3

Jack because he is still growing, or the others do not grow.

1 mark 1 mark

3

4

a brain b liver c lung d stomach Accept: phonetic mis-spellings such as ‘livver’, ‘stumack’.

2 marks – 2 marks for all correct, 1 mark for 2 or 3 correct, 0 marks for 1 or 0 correct.

4

4

kidney/bladder/ureter/urethra

5

kidney – cleans blood/makes urine bladder – stores urine ureter – carries urine to bladder urethra – tube that carries urine to outside Accept: phonetic mis-spellings.

2 marks – 1 mark for organ name, 1 mark for correct function.

4

3, 2, 1, 4 (parts of the results, the prediction, the aim, the conclusion).

2 marks – 1 mark for three in the correct order, 2 marks for all four in the correct order.

a

5

digestive system

1 mark

b

5

List of organs: gullet (accept food pipe), stomach, small intestine, large intestine, rectum, anus.

Accept: phonetic mis-spellings such as ‘stumack’, ‘intestin’, ‘recktem’.

2 marks – 1 mark for all organs listed, 1 mark for correct order. If organs are missed out, students can still get 1 mark for correct ordering of those that they have named.

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Question

Part

Level Answer

Mark scheme

7

a

5

xylem tissue Accept: tissue.

1 mark

b

6

Expected answer is root hair cell.

Accept: other specialised plant cells (e.g. phloem, guard, epithelial, palisade).

2 marks – 1 mark for the name of a specialised cell, 1 mark for the correct function of that cell.

The cell absorbs water from the ground.

Accept: other correct functions of named cells.

C

6

Any of: nucleus, cell surface membrane, cytoplasm, mitochondria.

Accept: mis-spellings, and ‘cell membrane’.

Do not accept: membrane.

1 mark

d

6

Correct function of cell part given in part d.

1 mark

8

5

50

1 mark

9

5

The kidneys remove the waste materials from the blood.

The kidneys make urine.

Urine is stored in the bladder.

Urine/waste materials is/are removed from the body when you pee.

The kidneys and bladder form part of the urinary system.

2 marks – 1 mark for each of the points on the left to a maximum of two.

10

3

elephant, human

2 marks – one for each correct.

11

3

correct labelling, clockwise from top right: a embryo, b - child, c - adolescent, d - adult

2 marks – two for all correct, 1 mark for 2 correct.

a

5

one from: the organisms grow as they get older; the new organisms develop from fertilised eggs; it takes time before they can reproduce.

1 mark

b

5

one from: the fly lifecycle is much shorter; the young flies look nothing like the adults; the flies lay many more eggs.

1 mark

4

Clear organisation of notes.

Similarities: both gametes start to be released in teens.

Differences: different cells, egg cells made inside the body but sperm cells made hanging outside.

2 marks – 1 mark for clear organisation, 1 mark for at least one similarity and one difference. Do not accept similarities or differences that are not referred to in text.

a

4

13

1 mark – accept ‘between 13 and 14’, accept ‘between 13 and 13.5’. Do not accept ‘in the middle of the graph’.

b

5

Two from: voice breaks, hair grows, penis and testes grow, sperm cells start being produced, body odour develops.

2 marks – 1 mark for each correct.

c

5

puberty

1 mark

12

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15

5

X is fertilisation Y is implantation

2 marks – 1 mark for each.

16

a

5

vagina, cervix, uterus

3 marks – 1 mark for the order, 1 mark for all three names correct (but with misspellings), 1 mark for correct spelling of all three names.

17

a

6

menstruation – in which blood and the uterus lining flow out of the uterus/ vagina.

1 mark – to get the mark, both the name and the description are needed.

b

6

ovulation – in which an egg cell is released from an ovary.

1 mark – to get the mark, both the name and the description are needed.

c

6

So that the embryo can have a good supply of food/nutrients/oxygen from the mother.

1 mark

Final Level Calculation Old mark scheme Marks

Level

0–6

2 or lower

7-8

3c

9-11

3b

12-13

3a

14-16

4c

17-19

4b

20-21

4a

22-24

5c

25-26

5b

27-29

5a

30 -31

6c

32 - 33

6b

34 - 35

6a

36

7c

37

7b

38

7a

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New mark scheme Marks

Level

0–1

2 or lower

2-3

3c

4-5

3b

6-7

3a

8-10

4c

11-13

4b

14-15

4a

16-21

5c

22-27

5b

28-32

5a

33-35

6c

36-38

6b

39-40

6a

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