Marine Sciences Paper 2 (English)

November 2024 — Grade 12 / Matric — Marine Sciences

Past Paper 2024 Grade 12 English

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🎯 150 marks 📄 5 pages 📝 65 items found 📚 4 topics 🔑 1 key info

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Q1— Section header —

1.1Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A D\ next to the question numbers (1.1.1 to 1.1.10\n the ANSWER BOOK, e.g. 1.1.11

1.1.1All echinoderms are euryhaline. isohaline. thermohaline. stenohaline.

1.1.2Responsible travel to natural areas that takes the well being of the environment and the local communities into consideration:

1.1.3The image below is an example of a South African marine bird. [Source: Which ONE of the following options gives the CORRECT common name for the organism?

1.1The illustration below represents spiny brittle star belonging to the phylum Echinodermata.

1.1The following phrases relate to principles of ecotourism according to The International Ecotourism Society (TIES\

1.1n a rea in which there are restrictions on human activities, located between the Marine Protected Area (MPA\ and the area exposed to

1.1.7Engineers plan on design ing a building in a desert . This building will be designed with a cooling system

1.1.8Which ONE of the following is INCORRECT for angroves? The value of mangroves in estuaries is to

1.1.9The following terms are associated with kelp forests (i Infratidal zone (ii\ Nutrient

1.1.10The type of circulation found in tunicates Single Double Closed

1.2Give the correct scientific term/phrase for each of the following descriptions. Write only the term/phrase next to the question numbers (1.2.1 to 1.2.10\in the ANSWER BOOK.

1.2.1iver mouths, their associated banks and beds which are subject to the tidal ebb and flow of the sea water

1.2.2Sideward extensions from the arms of feather stars

1.2.3Water filled compartments around the stomachs of rittle stars which open to the outside

1.2.4Eggs which have a waterproof shell and a fluid filled sac around the embryo enabling the embryo to develop and hatch out on dry land

1.2.5High shore eulittoral zone, characterised by small winkles

1.2.6The capacity of ecosystems to respond to pressures or disturbances

1.2.7Increased biomass into areas neighbouring MPAs

1.2.8Skeleton of a sea urchin

1.2.9Non living scales which are formed on the outside of an animal s skin and will be replaced by moulting

1.2.10When whales drift , head down, with their tails out of the water to sail slowly with the wind (10 x 1\ (10\ Marine Science

1.3Indicate whether each of the descriptions in COLUMN I applies to A ONLY ONLY BOTH A AND

1.3.1Blastopore becomes the mouth A: euterostome B: rotostome

1.3.2Marine amphibians A: aecilians B: alamander

1.3.3Intermediate zone A: ea bamboo ( Ecklonia maxima B: plit fan kelp (

1.3.4East Coast A: yster belt B: rgenvillei zone

1.3.5ngineering inspired by kelp holdfast A: sing benign materials B:

Q2— Section header —

2.1The sea squirt ( Didemnum sp. \and the Star Tunicate ( Botryllus schlosseri \are both invasive species that occur in colonies. The sea squirt lives at deeper depths than the Star Tunicate. A study was done to determine how both species would respond to small

2.1.1Explain how colonial ascidian species differ from solitary ascidian species (2\

2.1.2State a hypothesis for th study above. (2\

2.1.3Suggest ONE way in which th is study can be made more valid. (1\

2.1.4Draw a double line graph to show the data above. (10 Marine Science /P

2.3Read the article below and answer the questions that follow. FROM LITTLE THINGS GIANTS GROW The Giant Kelp Restoration Project is the first of its kind in Tasmania, Australia. This project helps to recover

2.3.1How can Giant Kelp be used to mitigate the effects of climate change? (1\

2.3.2This project was conducted along the East Coast of Tasmania '. Explain why the

2.3.3State TWO ways in which restoring the Giant Kelp can contribute to boosting ecotourism along the east coast of Tasmania. (2\

2.3.4Discuss TWO ways in which this project could contribute to the environmental protection pillar of an ecotourism business plan. (2 x 2\ (4\

2.3.5Although this project will be of benefit to visitors, the impact of overtourism should be prevented. Give ONE piece of advice for the Tasmania

2.3.6In your opinion, should projects like the Giant Kelp Restoration roject be used as an ecotouris attraction? (2\ (13\ [36] Marine36

Q3— Section header —

3.1Read the article below about a turtle carapace and answer the questions that follow. SOFT SHIELD DISTRIBUTES FORCE The characteristics

3.1.1ther than protection, give ONE additional function of the turtle carapace

3.1.2xplain how the carapace is abl e to assist the turtle to deal with increase pressure while diving

3.1.3The turtle's carapace provides valuable inspiration for the development of new materials in deep sea exploration. (a\ Explain the

3.2A beach along the Eastern Cape coastline experiences calm waves and current conditions . During a certain time of year, an influx of finer sediment is deposited along the intertidal zone. White Mussels

3.2.1State ONE biotic factor that will cause the White Mussel to burrow. (1\

3.2.2Describe the profile of this beach. (1\

3.2.3State why White Mussels move in the sand with the rising and falling of the tides (1\

3.2.4Explain TWO structural ways in which the White Mussel is adapted to survive the influx of sediment load. (2 x 2\ (4\

3.2.5Discuss the effect that the influx of finer sediment will have on the burrowing behaviour of White Mussels (2\ (9\

3.3Read the extract below and answer the questions that follow. The Reef Manta Ray Mobula alfredi is generally found in areas with wat er temperatures between 20

3.3.1ow are the pectoral fins of the Reef Manta Ray adapted for movement? (1

3.3.2Rays make use of counter current heat exchange to thermoregulate during their deep dives. Explain this mechanism. (3

3.3.3Draw a labelled diagram illustrating the blood circulation found in Reef Manta Rays (4\ (8\ Marine Science

3.4Read the article below and answer the questions that follow. CALL TO PROTECT AFRICAN PENGUINS AS EXTINCTION THREAT LOOMS The Southern African Foundation for the Conservation of Coastal Birds (SANCCOB\and BirdLife South Africa are calling on marin

3.4.1Why do scientist emphasis the number of breeding pairs

3.4.2Do you think that protecting the correct areas is enough to increase the population of African enguins? Substantiate your answer. (2\

3.4.3Explain TWO key benefits that an increase in the size of a Marine Protected Area (MPA\ could have on the African Penguin population.

3.4.4How would the scientist use data to select and decide on suitable sites for this MPA?

3.4.5Suggest which IU CN MPA category would be considered for selecting an area to conserv

Q4— Section header —

Q5— Section header —

Topics Identified

GeneticsEcologyHuman PhysiologyAnimal Behaviour

Mark Allocation

Total150 marks

Sections36 + 39 = 75 marks

Key Information

Websitewww.natureaustralia.org.au · www.ecomagazine.com

Paper information

SubjectMarine Sciences

Year2024

SessionNovember

TypePast Paper

PaperPaper 2

LanguageEnglish

Pages15

Downloads5

Examination context

Decade2020s

Years ago2y

SeasonSpring (SH)

Start dayTuesday

Exam periodNovember 2024

Days since exam721

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Corresponding marking memorandum

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Marine Sciences Memo 1 (English) →

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