Document Text Contents
Page 1
r qto TEST CODE OI2O7O2O -l
FORM TP 2017045 MAY/JUNE 2017
CARIBBEAN EXAMINATIONS COUNCIL
CARIBBEAN SECONDARY EDUCATION [email protected]
EXAMINATION
BIOLOGY
Paper 02 - General Proficiency
2 hours 30 minutes
DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO.
READ THE FOLLOWING INSTRUCTIONS CAREFULLY.
1. This paper consists of SIX questions in TWO sections. AnswerALL questions.
2. Write your answers in the spaces provided in this booklet.
3. Do NOT write in the margins.
4. Where appropriate, answers should be illustrated with diagrams.
If you need to rewrite any answer and there is not enough space to do so on the
original page, you must use the extra lined page(s) provided at the back of this
booklet. Remember to draw a line through your original answer.
If you use the extra page(s), you MUST write the question number clearly in
the box provided at the top of the extra page(s) and, where relevant, include
the question part beside the answer.
5
6.
Copyright @ 2015 Caribbean Examinations Council
All rights reserved.
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0120702003 JL-'.or,oro2o. 2or7
Page 2
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SECTION A
AnswerALL questions in this section.
Write your answers in the spaces provided in this booklet.
In an experiment, some students put corn seeds into each of two test tubes labelled A and
B, as shown in Figure l.
20"c 10 "c
Moist cotton wool
Figure 1. Apparatus and materials used for experiment
(i) Write a suitable aim for this experiment.
(2 marks)
(iD In which of the tubes, A or B, would germination most likely occur? Give ONE
reason for your answer.
(2 marks)
(iii) State TWO roles that the moisture from the coffon wool plays in the process of
germination.
(2 marks)
GO ON TO THE NEXT PAGE
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1. (a)
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3. (a) Figure 4 illustrates the events that take place during the human menstrual cycle.
Hormone Y
Hormone X
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Figure 4. Human menstrual cycle
Identifu Hormones X and Y and the event occuning at Z.
x ...............
Y ...............
Z
(ii) What is the role of EACH hormone in the menstrual cycle?
Y.....
(3 marks)
(2 marks)
GO ON TO THE NEXT PAGE
012070208 20t7
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Page 9
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(iiD Name the organ that produces Hormones X and Y.
x
(2 marks)
(i") Discuss the fate of the following structures shown in Figure 4 if fertillzation of
the ovum occurs.
Corpus luteum
Uterus lining
(4 marks)
Some contraceptive pills contain hormones. Suggest how this may prevent pregnancy.
(1 mark)
A drug company is developing a male contraceptive pill. Suggest THREE ways in which
this could prevent pregnancy.
(3 marks)
Total 15 marks
GO ON TO THE NEXT PAGE
Y
(b)
(c)
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Page 16
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Some environmentalists encourage the practice of introducing predators to an ecosystem
to control a population of pests rather than the use of agricultural chemicals.
(i) Outline THREE advantages and THREE disadvantages of this method ofbiological
control compared to the use of chemicals.
(6 marks)
GO ON TO THE NEXT PAGE
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Page 17
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(iD Explain how biological control may conhibute to biological evolution through
natural selection in an ecosystem.
(3 marks)
Total 15 marks
END OF TEST
IF yOU FINISH BEFORE TIME IS CALLED, CHECK YOUR WORK ON THIS TEST.
01207020/F 20t7
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L 0120702019 Iffi
r qto TEST CODE OI2O7O2O -l
FORM TP 2017045 MAY/JUNE 2017
CARIBBEAN EXAMINATIONS COUNCIL
CARIBBEAN SECONDARY EDUCATION [email protected]
EXAMINATION
BIOLOGY
Paper 02 - General Proficiency
2 hours 30 minutes
DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO.
READ THE FOLLOWING INSTRUCTIONS CAREFULLY.
1. This paper consists of SIX questions in TWO sections. AnswerALL questions.
2. Write your answers in the spaces provided in this booklet.
3. Do NOT write in the margins.
4. Where appropriate, answers should be illustrated with diagrams.
If you need to rewrite any answer and there is not enough space to do so on the
original page, you must use the extra lined page(s) provided at the back of this
booklet. Remember to draw a line through your original answer.
If you use the extra page(s), you MUST write the question number clearly in
the box provided at the top of the extra page(s) and, where relevant, include
the question part beside the answer.
5
6.
Copyright @ 2015 Caribbean Examinations Council
All rights reserved.
I il]il ilil til! tilt ilil lllll llll lill llll llll lil lill
0120702003 JL-'.or,oro2o. 2or7
Page 2
t- -4-
SECTION A
AnswerALL questions in this section.
Write your answers in the spaces provided in this booklet.
In an experiment, some students put corn seeds into each of two test tubes labelled A and
B, as shown in Figure l.
20"c 10 "c
Moist cotton wool
Figure 1. Apparatus and materials used for experiment
(i) Write a suitable aim for this experiment.
(2 marks)
(iD In which of the tubes, A or B, would germination most likely occur? Give ONE
reason for your answer.
(2 marks)
(iii) State TWO roles that the moisture from the coffon wool plays in the process of
germination.
(2 marks)
GO ON TO THE NEXT PAGE
-l
1. (a)
0t207020tr' 2017
BA
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=
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-..l
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=
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:+
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s-
=....\
z
.'-A..\
l-s
..-....
---i--
.Er.t
l+
.:fr
..tE
..>
t\
:-_A
u
..4
--:=
'.fi
Page 8
r - l0-
3. (a) Figure 4 illustrates the events that take place during the human menstrual cycle.
Hormone Y
Hormone X
-l
O
q)
o
tr
6l
(l)
9
U
4I0
@
Follicle develops
Menstruation
@
ililtilil] lil il]tilfl ll]fl!ilililt ult illil]illll
2
Time (weeks)
3
ffi(9
A\ Cornus ruteum
e# develops
Z
o!
o
q)
p
(i)
01234
Time (weeks)
Figure 4. Human menstrual cycle
Identifu Hormones X and Y and the event occuning at Z.
x ...............
Y ...............
Z
(ii) What is the role of EACH hormone in the menstrual cycle?
Y.....
(3 marks)
(2 marks)
GO ON TO THE NEXT PAGE
012070208 20t7
L 0120702010 J
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1.ft.
x
Page 9
-lr - 11-
(iiD Name the organ that produces Hormones X and Y.
x
(2 marks)
(i") Discuss the fate of the following structures shown in Figure 4 if fertillzation of
the ovum occurs.
Corpus luteum
Uterus lining
(4 marks)
Some contraceptive pills contain hormones. Suggest how this may prevent pregnancy.
(1 mark)
A drug company is developing a male contraceptive pill. Suggest THREE ways in which
this could prevent pregnancy.
(3 marks)
Total 15 marks
GO ON TO THE NEXT PAGE
Y
(b)
(c)
012070201F 2017
I tilil illt illl illfl fllt illl lil lllll illl llil llll llll IL 0120702011
Page 16
t- -18-
Some environmentalists encourage the practice of introducing predators to an ecosystem
to control a population of pests rather than the use of agricultural chemicals.
(i) Outline THREE advantages and THREE disadvantages of this method ofbiological
control compared to the use of chemicals.
(6 marks)
GO ON TO THE NEXT PAGE
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(b)
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Page 17
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(iD Explain how biological control may conhibute to biological evolution through
natural selection in an ecosystem.
(3 marks)
Total 15 marks
END OF TEST
IF yOU FINISH BEFORE TIME IS CALLED, CHECK YOUR WORK ON THIS TEST.
01207020/F 20t7
-l
L 0120702019 Iffi
