Download CXC CSEC Biology 2017 June P2 PDF

TitleCXC CSEC Biology 2017 June P2
TagsBiology Nature Earth & Life Sciences Wellness Life Sciences
File Size519.8 KB
Total Pages17
Table of Contents
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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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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 ...............

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(ii) What is the role of EACH hormone in the menstrual cycle?

Y.....

(3 marks)

(2 marks)

GO ON TO THE NEXT PAGE
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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

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(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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(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.

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