Year 11 Bio - Sem 1 exam practice.doc

MARIST COLLEGE KOGARAH

MARIST COLLEGE KOGARAH

Biology

General Instructions

Reading time 5 minutes

Working Time 1 hour 30 minutes

Board Approved calculators may be used

Write using black or blue pen

Write all answers in the space provided

Total Marks 60

This paper has two parts, Part A and Part B

Part A

Total marks (15)

Attempt all questions 1-15

Allow about 20 minutes for this part

Part B

Total marks (45)

Attempt questions 16-25

Allow about 1 hour 30 minutes for this par

1. The word equation below outlines a process that occurs in living cells.

glucose + oxygen ( carbon dioxide + water

What is the name of this process?

(A)photosynthesis

(B)respiration

(C)protein synthesis

(D)fermentation

2. Why are decomposers so important in an ecosystem?

(A) They convert energy from the Sun into a form that can be used by animals (B) They change atmospheric nitrogen into a from that can be used by plants (C) They release oxygen gas into the atmosphere

(D) They break down organic material and return nutrients to the soil

3. What type of interaction does the photograph below shows?

(A) parasitism (B) mutualism

(C) commensalism (D) allelopathy

4. At which level of classification are living things least alike?

(A)genus

(B)phylum

(C) species

(D) order

5. Consider a simple ecosystem in an aquarium. A correct grouping of abiotic and biotic components for ecosystem could be:

Abiotic ComponentsBiotic Components

(A)Fish, water plants, Nitrobacter (bacteria)Water, gravel, temperature, light, nitrogen, gases

(B)Fish, water plants, water, gravel, nitrogen gasesTemperature, light

(C)Water, gravel, temperature, light, nitrogen gasesFish, water plants, Nitrobacter (bacteria)

(D)Temperature, lightWater plants, Nitrobacter (bacteria), water, gravel, nitrogen gases

6. The food web below shows the feeding relationships between six species in a pond.

Which organism in the food web is both a herbivore and a carnivore (or an omnivore)?

(A) Kingfisher

(B) Pond weed

(C) Mosquito

(D) Tadpole

7. There is considerable evidence that life originated on Earth about 3.8 billion years ago. Which combination of conditions is thought to be most like those on earth at around this time?

(A)oxic, high temperature and low radiation

(B)oxic, low temperature and high radiation

(C)anoxic, high temperature and high radiation

(D)anoxic, low temperature and high radiation

.

8. The graph below shows the expected relationship between prey population density and predator population density over an extended period of time.

What is the BEST conclusion to be drawn from the graph?

(A) Predators have no direct effect on the numbers of prey organisms

(B) When the prey population increases, there is more food for the predator and therefore the predator population increases. (C) When the numbers of predators are at a maximum, the numbers of prey are at a minimum.

(D) The numbers of prey will always be less than the numbers of predators

9. Why is it often difficult to classify an extinct organism?

(A) There may be no other similar type of living or extinct organism to compare it to. (B) We cannot see any structure in an extinct organism.

(C) This organism was living before any classification system was developed.

(D) There are often many types of similar extinct organisms, making it very difficult to classify.

10. Which technological advance has contributed most to our understanding of Procaryotic organisms?

(A) The light microscope (B) The electron microscope (C) Staining techniques

(D) The stereomicroscope

11. How did the development of an ozone layer around the Earth contribute to the evolution of life?

(A) Ozone was used as an energy source by early organisms.

(B) Ozone was converted to oxygen which created a breathable atmosphere.

(C) Ozone formed a protective layer, shielding organisms from harmful ultraviolet radiation.

(D) Ozone increased the growth of anaerobic organisms enabling them to colonise swamps and bogs.

12. A student drew a biomass energy pyramid of organisms, which she thought would be found in the ocean.

Why is the population of sharks small in number?

(A) Sharks prey on humans and have thus been hunted to reduce their numbers. (B) Sharks do not reproduce rapidly because they are primitive animals.

(C) There is limited space available because organisms get bigger and bigger as you go up the energy pyramid.

(D) There is much less energy available for organisms at the top of energy pyramid.

13. The capture/recapture technique was used to estimate the abundance of scrub wrens in an area. In the first capture, 4 were trapped. In the recapture, 8 were caught and 2 of these were marked. From this data, the abundance of scrub wrens in the area is about:

(A) 4

(B) 8

(C)16

(D)24

14. Hostile environments in existence today support procaryotic archaea, once thought to be extinct. From this we can conclude that:(A)the hostile environments of today are similar to the environments in which procaryotic life existed billions of years ago.

(B)these archaea live for billions of years.

(C)these archaea will soon become fossils.

(D) these archaea are similar to present day aerobic bacteria. 15. Use the key and picture of an Australian animal to answer the question below.

laHas a backbonego to2

lbDoes not have a backbonego to6

2aHas gillsGirella tricuspidata

2bHas lungsgo to3

3aHas scaly or naked skingo to4

3bHas covering over skingo to5

4aNo scalesLitoria andiirmalin

4bScaly skinChlamvdosaurus kinf(ii

5aHas feathersDromaius novaehollandiae

5bHas fur or hairDasvurus Reoffroii

6aHas wingsProsotas dubiosa

6bHas clawsCherax destructor

What is the scientific name of the animal shown in the picture?

(A) Chlamydosaurus kingii (B) Cherax destructor

(C) Litoria andiirmalin

(D) Girella tricuspidata

Section II

Total marks (45)

Attempt Questions 16 - 25

Allow about 1 hour 30 minutes for this section

Answer the questions in the spaces provided.

Question 16 (5 marks)In the 1950s Urey and Miller performed a series of classic experiments. Their results were to have a significant effect on our understanding of chemical evolution.

They subjected a mixture of methane, carbon dioxide, ammonia, nitrogen, hydrogen and water vapour to electrical discharges and heat.

(a) Outline the reason for their experiments.1(b) Outline the results of their experiments.1

(c)Discuss the importance of their experiments in illustrating the nature and practice of science.2

(d) Describe the contribution that their experiments made to hypotheses about the origin of life.1

....................................................................................................................................................................................................................................................................................................................................................................................................................

Question 17 (4 marks)

Evaluate the impact of ONE technological change on the development and/or revision of biological classification systems. Question 18 (4 marks)

Construct a table to describe some of the palaeontological and geological evidence that suggests when life originated on Earth? Include examples of both types of evidence in your table.

Question 19 (3 marks)

This question refers to the two food webs shown below.

Food web A represents a situation with a high biodiversity. Food web B represents situation with very low biodiversity where at some levels the food path involves only a single type of organism.

(a) If all the lizards were to die out in food web A, what effect would this have on the 2 population of snakes? Explain your answer.

.....

(b) Explain why organisms in Food Webs with a low biodiversity, such as Food Web B are at risk of dying out.

1 ..Marks Question 20 (4 marks)

(a) Define the terms genus and species.2

(b) Describe the main features of the binomial system of classification.2

Question 21 (3 marks)

(a) Define the term abiotic factor. 1

(b) In the space below, construct a table to compare aquatic and terrestrial ecosystems in terms of ONE abiotic factor. 2 Question 22 (7 marks)

To survive and reproduce, organisms must deal effectively with factors in their environment such as:

Maintaining water balance

Exchanging gases

Obtaining food

Support and movement

During your study of A Local Ecosystem you examined adaptations of organisms.

(a) NAME an organism that you have studied.

For the organism, identify specific adaptations and describe how they assist the organism in dealing with any TWO of the above factors.

2

(b) Not all features of an organism can be considered as adaptations. Discuss ONE problem associated with assuming that certain features are adaptations for living in a particular habitat.

2(c) Describe ONE trophic interaction between the named plant or animal you studied and ONE other organism. 1(d) Identify TWO impacts humans have had on the area you studied.

2

Question 23 (5 marks)

(a) Define the term procaryotic organism . 1

(b) Choose an organism from the following list:

Archaea

Eubacteria

Stromatolites

Nitrogen Fixing Bacteria

Deep sea bacteria

Methanogens

Organism chosen: ....................................................................................................

(i) Describe the main features of the environment this organism occupies. 2

(ii) Identify the role this organism plays in its ecosystem. 2

Question 24 (6 marks)

Much of our current knowledge about the history of life on Earth is based on the study of palaeontology.

a) Describe ONE problem that may arise when using palaeontological evidence to develop a timeline for the history of life on Earth.

2

b) The study of fossils has revealed several trends in the evolution of life forms on the Earth.

Identify ONE such trend 1

c) Using an example, explain why social conflict arises with developments in scientific knowledge.

3

Question 25 (4 marks)

During your study of this course you were required to perform an investigation to use the transect method.

(a)

Explain why the transect method was used.

1 (b)

Describe how you carried out this process.

1.

(c)

Analyse the advantages and disadvantages of using the transect method.

2 EMBED Word.Picture.8

EMBED PBrush

Fish

Heron

Tadpole

Kingfisher

Pond weed

Mosquito larvae

_1015609482.doc