Igcse Biology
BIOLOGY
Paper 2 Core
1 hour 15 minutes
No Additional Materials are required.
READ THESE INSTRUCTIONS FIRST
Write in dark blue or black pen.
You may use a pencil for any diagrams or graphs.
Do not use staples, paper clips, highlighters, glue or correction fluid.
Answer all questions.
1
2
3
4
5
6
7
8
9
Total
This document consists of 14 printed pages and 2 blank pages.
IB10 11_0610_21/4RP
© UCLES 2010
[Turn over
2
1
(a) Fig. 1.1 shows a mammal.
For
Examiner's
Use
Fig. 1.1
Describe two external features that occur in mammals but do not occur in other vertebrates. 1.
2.
[2]
(b) Fig. 1.2 shows an arthropod.
Fig. 1.2
Describe two external features that occur in all arthropods.
1.
2.
[2]
[Total: 4]
© UCLES 2010
0610/21/O/N/10
3
2
Fig. 2.1 shows a population growth graph for a herbivorous insect that has just entered a new habitat.
For
Examiner's
Use
C
number of insects B
D
A
time
Fig. 2.1
(a) (i) Which of the four phases, labelled A, B, C and D, represents the stationary phase and which the lag phase? stationary phase lag phase
[2]
(ii) During which phases will some of this insect population die? phases [2]
(b) (i) State two factors that could affect the rate of population growth during phase C. factor 1 factor 2
[2]
(ii) Suggest how these two factors might change. Explain how each change would affect the rate of population growth. factor 1
factor 2
[4]
[Total: 10]
© UCLES 2010
0610/21/O/N/10
[Turn over
4
3
Fig. 3.1 shows a section through the heart.
semilunar valve For
Examiner's
Use
B
C
tricuspid valve A
D
Fig. 3.1
(a) (i) Name the chamber of the heart labelled D.
[1]
(ii) State which of the chambers, A to D, contain deoxygenated blood.
[1]
(b) The pulmonary blood vessels carry blood into and away from the heart.
Complete Table 3.1 to give three differences between the
Paper 2 Core
1 hour 15 minutes
No Additional Materials are required.
READ THESE INSTRUCTIONS FIRST
Write in dark blue or black pen.
You may use a pencil for any diagrams or graphs.
Do not use staples, paper clips, highlighters, glue or correction fluid.
Answer all questions.
1
2
3
4
5
6
7
8
9
Total
This document consists of 14 printed pages and 2 blank pages.
IB10 11_0610_21/4RP
© UCLES 2010
[Turn over
2
1
(a) Fig. 1.1 shows a mammal.
For
Examiner's
Use
Fig. 1.1
Describe two external features that occur in mammals but do not occur in other vertebrates. 1.
2.
[2]
(b) Fig. 1.2 shows an arthropod.
Fig. 1.2
Describe two external features that occur in all arthropods.
1.
2.
[2]
[Total: 4]
© UCLES 2010
0610/21/O/N/10
3
2
Fig. 2.1 shows a population growth graph for a herbivorous insect that has just entered a new habitat.
For
Examiner's
Use
C
number of insects B
D
A
time
Fig. 2.1
(a) (i) Which of the four phases, labelled A, B, C and D, represents the stationary phase and which the lag phase? stationary phase lag phase
[2]
(ii) During which phases will some of this insect population die? phases [2]
(b) (i) State two factors that could affect the rate of population growth during phase C. factor 1 factor 2
[2]
(ii) Suggest how these two factors might change. Explain how each change would affect the rate of population growth. factor 1
factor 2
[4]
[Total: 10]
© UCLES 2010
0610/21/O/N/10
[Turn over
4
3
Fig. 3.1 shows a section through the heart.
semilunar valve For
Examiner's
Use
B
C
tricuspid valve A
D
Fig. 3.1
(a) (i) Name the chamber of the heart labelled D.
[1]
(ii) State which of the chambers, A to D, contain deoxygenated blood.
[1]
(b) The pulmonary blood vessels carry blood into and away from the heart.
Complete Table 3.1 to give three differences between the