2011 Prelim Bio Half Yearly Theory

Section 110 marks

Attempt All Questions Allow about 10 minutes for this sectionUse the multiple choice answer sheet to indicate the correct corresponding answer.

1 Which one of the following statements is an INCORRECT description of the cell theory?

(A) All things are made up of cells.

(B) Cells are the smallest units of life.

(C) All cells come from pre-existing cells.

(D) All cells come from pre-existing animal cells.

2 Identify what will happen to a terrestrial plant cell if it is placed in distilled water.

(A) The cell bursts due to water movement into the cell

(B) The cell will shrink because cytoplasm diffuses out of the cell

(C) The cell swells due to water movement into the cell.

(D) The cell stays the same because the cell wall prevents any increase in size.

3 To which scientist is the discovery of the nucleus inside cells attributed?

(A) Robert Brown

(B) Robert Hooke

(C) Anton van Leeuwenhoek

(D) Rudolf Virchow

4 Identify which one of the following is the principal ecological role of decomposers in an ecosystem.

(A) The recycling of inorganic nutrients.

(B) The recycling of energy.

(C) The removal of dead organisms and waste products.

(D) The removal, through disease, of unfit organisms.

GHS Preliminary Biology Task 2, 2011

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5 The clown fish dwell among the tentacles of the tropical sea anemone. The anemones are capable of stinging most fish, but the clown fish possess a special mucous coating that prevents the discharge of the anemone's stinging cells effecting it. The clown fish is protected from predators by the stinging cells of the anemone and in turn, the highly territorial clown fish, guards the anemone from its predators.

The symbiotic relationship described between the clown fish and the anemone would best be described as:

(A) commensalism

(B) parasitism

(C) mutualism

(D) allelopathy

6 The sketch map below shows the distribution of gorse in an area of heathland.

In order to determine the population density of gorse bushes, five quadrats were randomly placed as shown above.Each quadrat is 10m X 10m, giving an area of 100m2.

Use the five quadrats to determine the average population density of gorse bushes.

(A) 4 bushes/100m2

(B) 18 bushes/100m2

(C) 20 bushes/100m2


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(D) 90 bushes/100m2

7 Which of the following choices (A, B, C or D) correctly matches all groups of substances with their uses?

Proteins Carbohydrates Lipids

A Used as stores of energy Form part of membranesGrowth and repair of

cells

BWaterproof coatings on

leavesUsed as stores of energy

Important source of energy

CImportant source of

energyGrowth and repair of

cellsUsed as stores of energy

DGrowth and repair of

cellsImportant source of

energyUsed as stores of energy

Questions 8, 9 and 10 refer to the following information.

A food web from a Mountain Ash (species of Eucalypt tree) forest

8 What do the arrows in the food web indicate?

(A) The direction of movement of energy and matter.

(B) The direction of movement of light energy and matter.

(C) An evolutionary relationship between species.

(D) The species that are competing for resources in the community.


3

Quoll

9 In terms of interactions in the food web, what term would best describe the spider?

(A) Producer

(B) Animal

(C) Herbivore

(D) Carnivore

10 Which of the organisms would be classified as producers?

(A) Beetles

(B) Spiders

(C) Termites

(D) Trees

END OF PART A


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2011 PRELIMINARY HALF YEARLY EXAMINATION

Biology Name: ……………………….……...

Teacher: ……………………………

Section II - 40 marksAttempt Questions 11 - 21Allow about 35 minutes for this part

Answer the questions in the space provided.

MarksQuestion 11 (3 marks)

The following photographs show students using a quadrat and a transect to make measurements when studying a rock platform.

quadrat transect

In the space, construct a table to show the use, one advantage and one disadvantage for both of these techniques.

3


5

Question 12 (4 marks)

Using the human body as an example, distinguish between the terms ‘cells’, ‘tissues’ and ‘organs’ and ‘organ systems’ in multicellular organisms .

4


Define the term allelopathy and use an example to outline why and how an organism uses it.

2


6


(a) During the course you viewed a plant cell using a light microscope. In the space below, draw a scientific diagram to show the structures that can be viewed in a plant cell with a light microscope.

3

(b) Identify the general word equation for photosynthesis

2


7

Question 15 (4 Marks)

(a) Define the term 'adaptation'.

1

(b) Name and describe two examples of how humans have impacted on a local ecosystem that you have studied.

3


8


A year 11 biology student set up the following experiment to investigate the relationship between surface area and reaction rates. Below is a copy of his written report.

Relationship between surface area and reaction rates.

Aim: To investigate the relationship between the surface area of liver pieces and the rate at which oxygen gas is produced when the liver reacts with hydrogen peroxide.

Method1. Cut three cubes of liver, each 1cm x 1cm x 1cm.2. Put one cube in a test tube labelled number 13. Cut the second cube into 4 equal parts and place all four pieces into a

second test tube labelled number 24. Cut the third cube into 8 equal parts and place all eight pieces into a

third test tube in a test tube labelled number 3.5. Add 15mL of hydrogen peroxide to each test tube and immediately

place balloons over each test tube 6. Measure the circumference of each balloon every 2 minutes for 10

minutes and record your results.

ResultsMinutes

Test tube 1 (cm)

Test tube 2 (cm)

Test tube 3(cm)

2 2.0 3.00 5.04 2.1 3.25 5.56 2.2 3.50 5.08 2.3 4.00 6.5

10 2.4 4.25 7.0

Evaluate this experimental design.

6


9


Describe the current model of membrane structure and explain how it accounts for the movement of some substances into and out of cells

5


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Question 18 (3 Marks)

The diagram below shows five geometrical shapes.

In the space below construct a dichotomous key that could be used to identify the shapes. 3


State one abiotic variable in an ecosystem being studied. Identify the instrument/s used to measure it and outline the method used to take this reading.

3


11


The electron photomicrograph below shows a cell organelle.

(a) Identify this organelle.

1

(b) Outline its function.

1


Compare the processes of diffusion and osmosis.

3


12

END OF THE EXAMINATION

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2011 Prelim Bio Half Yearly Theory