2010 senior external examination biology paper two ... · pdf file2010 senior external...

2010 Senior External Examination

Biology Tuesday 2 November 2010

Paper Two — Question and response book 1 pm to 3:10 pm

Time allowed

• Perusal time: 10 minutes• Working time: 2 hours

Examination materials provided

• Paper Two — Question and response book

• Notepaper

Equipment allowed

• QSA-approved equipment

• non-programmable calculator

Directions

Do not write in this book during perusal time.

Paper One has two parts:

• Part A — Continuity of life

• Part B — Evolution and diversity

Suggested time allocation

• Part A: 60 minutes

• Part B: 60 minutes

Assessment

Assessment standards are at the end of this book.

After the examination session

The supervisor will collect this book when you leave.

Supervisor use only

QSA use only

Supervisor’s initials

Marker number

––

Candidate use

Print your candidate number here

Attach barcode here

Number of books used

1 0

Planning space

Part A — Continuity of life

Section 1 — Short response

Section 1 has eight questions that assess Understanding biology (UB) and Investigating biology (IB). Attempt all questions.

Respond to the questions in the spaces provided.

Question 1 (UB)

Briefly explain the major difference between meiosis and mitosis.

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Question 2 (UB)

In guinea pigs, short hair (S) is dominant over long hair (s). Two short-haired guinea pigs were mated and they produced equal numbers of short-haired and long-haired offspring. Show your working to establish the genotypes of the parents.

Question 3 (UB)

The Wollemi Pine is one of the world’s rarest plants. The natural population of about 38 plants has very little genetic diversity. Explain why this lack of genetic diversity may affect the ongoing survival of this species.

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2010 Biology — Paper Two — Question and response book 1

Question 4 (UB)

Draw a graph that shows the changes in thickness of the uterine wall throughout a complete menstrual cycle.

On the graph, explain the effects of one hormone in one stage.

Question 5 (UB)

Choose an organism that produces many offspring (e.g. a fish) and one that produces only one or two at a time (e.g. a horse). Compare and contrast the reproductive strategies of these organisms in relation to the success of the species.

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Thickness

Days0 28

2 2010 Biology — Paper Two — Question and response book

Question 6 (IB)

Use a pedigree (including an appropriate key that follows biological conventions) to demonstrate the inheritance of a sex-linked recessive gene on a family.

Question 7 (IB)

In snapdragons (a common decorative flowering garden plant), the homozygous conditions are red or white flowers while the heterozygous condition is pink flowers. This is an example of incomplete dominance. Use a Punnett square to show the working used to establish the genotypes and phenotypes of a cross between a white flower and a pink flower.


Question 8 (IB)

The following diagram shows a pedigree for the condition of albinism in humans. People with albinism lack pigment in the hair, skin and eyes.

State the type of inherited trait that albinism demonstrates. Use information provided in the diagram in your response.

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End of Section 1

A B

C

I

N

K

D

J

O

L M

E F G H

I

II

III

IV


Section 2 — Extended response

Section 2 has two questions that assess Evaluating biological issues (EBI). Write an extended response to one of the questions below.

Your response must refer to biological principles, concepts and ideas.

Plan your response carefully. If you do a first draft and then a final draft, indicate which is the draft to be assessed.

Either

Question 1 (EBI)

Critically evaluate the use of transgenic organisms in modern science and agricultural research.

or

Question 2 (EBI)

The increasing demand for reproductive technologies due to a variety of reasons could result in artificial selection of the human genome.

Justify the development of selection criteria for the use of reproductive technologies based on biological principles. Successful applicants could be people who are unable to reproduce naturally due to genetic disorders.

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Tick the question you have chosen: 1 2


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End of Section 2

End of Part A


Part B — Evolution and diversity

Section 1 — Short response

Section 1 has six questions that assess Understanding biology (UB) and Investigating biology (IB). Attempt all questions.

Respond to the questions in the spaces provided.

Question 1 (UB)

When using the binomial naming system of classification, the first word represents which level of taxonomy?

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Question 2 (UB)

Stinging nettles, blue-bottle jellyfish and wasps are all capable of producing painful stings. From which type of evolution is this characteristic most likely to have evolved?

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Question 3 (UB)

Male kangaroos establish territories containing a number of female kangaroos with whom they mate. They must fight other males to maintain these territories. Male kangaroos are much larger than females and are specifically adapted to establish and defend their territories. In terms of natural selection, explain one advantage and one disadvantage of this type of competition between males.

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Question 4 (UB)

Briefly explain Darwin’s theory of natural selection, using an appropriate example.

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Question 5 (UB)

Construct a dichotomous key that will correctly classify the following organisms: mammal, bird, reptile, fish, insect.


Question 6 (IB)

The table below shows comparisons between the amino acid sequences in the DNA of echidnas, platypus and kangaroos.

Use a diagram to show the evolutionary relationship between the organisms in the table. Explain your reasoning with specific reference to the data.

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End of Section 1

Pairs of organisms Number of amino acid differences

Platypus – grey kangaroo 35

Platypus – echidna 10

Platypus – potoroo 32

Echidna – potoroo 29

Echidna – grey kangaroo 34

Potoroo – grey kangaroo 11


Section 2 — Extended response

Section 2 has two questions that assess Evaluating biological issues (EBI). Write an extended response to one of the questions below.

Your response must refer to biological principles, concepts and ideas.

Plan your response carefully. If you do a first draft and then a final draft, indicate which is the draft to be assessed.

Either

Question 1 (EBI)

Discuss how medical technology could impact on the evolutionary pathways of humans.

or

Question 2 (EBI)

Pesticide and antibiotic resistance is a growing concern in the scientific community.

Critically evaluate how these issues have been able to surface in the last 100 years. Predict the effect of this problem continuing unchecked in the future.

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Tick the question you have chosen: 1 2


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End of Section 2

End of Part B

End of Paper Two


Additional pages for responses (if required)

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Part Section Question


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Acknowledgment

Aubusson P, Kennedy E & Hickman P 2000, Biology in Context: The Spectrum of Life, 2nd edn, Oxford University Press, Melbourne.

Every reasonable effort has been made to contact owners of copyright material. We would be pleased to hear from any copyright owner who has been omitted or incorrectly acknowledged.

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© The State of Queensland (Queensland Studies Authority) 2010

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Enquiries relating to copyright in this material, which is owned by the State of Queensland or the Queensland Studies Authority, shouldbe addressed to:

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2010 senior external examination biology paper two ... · pdf file2010 senior external...

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