Marine Sciences Download P2

November 2025 — Grade 12 / Matric — Marine Sciences

Past Paper 2025 Grade 12 English

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🎯 150 marks 📄 17 pages 📝 64 items found 📚 5 topics 🔑 2 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\ in the ANSWER BOOK, e.g. 1.1.11

1.1.1Animals found in the lower eulittoral zone are not well adapted predation. wave action. desiccation. turbulence.

1.1.2The image below shows a species of cetacean that is found along the coast of South Africa. [Source: https://cetacea.fandom.com Which ONE of the following options gives the CORRECT common name for the cetacean

1.1.3Which ONE gives a CORRECT key principle of The International Ecotourism Society (TIES\? Allowing tourists to interact with wild animals Avoiding tourism activities in natural areas Allowing tourists to experience local traditions

1.1.4Which option will exclude an area from being a community managed local marine reserve Presence of rare species Supports overexploited species Area has a large economic development Area is aesthetically appealing

1.1.5

1.1.6Which ONE of the following comparisons is INCORRECT with regard to reproduction in amphibians and reptiles? AMPHIBIANS REPTILES Undergo metamorphosis Born identical to the parents Soft permeable shell

1.1.7The structures below are found in echinoderms (i\ Papulae (ii\ Pyloric caecae (iii\ Water vascular system (iv\

1.1.8The high productivity found in kelp forest ecosystems is a result hedding of kelp fronds onstant sunlight exposure ack of predators igh salinity levels

1.1.9The following statements relate to sea stars (i\ Digestive enzymes partially digest the food source. (ii\ The s tomach is everted outside of the sea star

1.1.10

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.

1.2.1High pitched sounds emitted by bats and cetaceans to detect objects dark or poor visual environments

1.2.2A notochord divided into flexible segments of cartilage or bone

1.2.3The thin strips fanning out from the gill arches of fish to provide a broad gaseous exchange surface

1.2.4Benefits to a habitat provided by nature and healthy ecosystems, such as provision of nutrients and good water quality

1.2.5A process in many diving animals, where the blood supply to critical organs and tissues is restricted while they are diving, enabling all available oxygen to go to the brain and muscles responsible for swimming

1.2.6The region just below the spring low tide mark

1.2.7Structure found in marine birds that produce oil for waterproofing the feathers

1.2.8Experiences offered to tourists centred on wild or natural environments

1.2.9Feathery branches found in sea cucumbers extending into the coelom from the rectum that draw in sea water to aid gaseous exchange

1.2.10A bony plate covering the gill chamber of a fish (10 x 1\ (10\

1.3Indicate whether each of the descriptions in COLUMN I applies to A ONLY ONLY BOTH A AND NONE of the items in COLUMN II. Write A only B only

1.3.1Ecotourism business plan building infrastructure upskilling communities

1.3.2Star shaped inhalant siphon scidian White Mussel

1.3.3IUCN category of Robben Island habitat management area protected landscape

1.3.4Middle shore Ghost Crab sand hopper

1.3.5Toxic to most predators Chelonia mydas Eretmochelys imbricate (5 x 2\ (10\ TOTAL SECTION A:

Q2— Section header —

2.1Study the investigation below and answer the questions that follow. African enguins ( Spheniscus demersus \re critically endangered seabirds

2.1.1Give the independent variable for this investigation. (1\

2.1.2Draw a bar graph to show the data above. (8\

2.1.3Explain how an increase in the average dive depth could impact the survival rate of penguin chicks. (3\

2.1.4Explain TWO ways in which penguins are adapted to reduce the amount of energy used when diving deeper for small pelagic fish (2 x 2\ (4\ 10

2.2Read the case study below and answer the questions that follow. NEST RAPID RESPONSE TEAM Cape Bream ( Pachymetopon blochii colonies and the Common Brittlestar Ophiothrix fragilis \ are found in the kelp forests.

2.2.1Discuss why Cape Breams build their nests in kelp forests. (2\

2.2.2State the relationship taking place between the Common Brittlestar and the Cape Bream eggs. (1\

2.2.3(a\ Name the reproductive strategy found in the Cape Bream. (1\ (b\ Evaluate whether the reproductive strategy named in

Q2— Section header —

2.2.4(a\ Discuss how the Common Brittlestars are able to detect the scent of the Cape Bream eggs. (3\ (b\ Describe how the Common Brittlestars would move itself forward towards the Cape Bream nests. (2\

2.3Study the text and the image below regarding the African Black Oystercatcher and answer the questions that follow. OYSTERCATCHER FINE DINING The near threatened African Black Oystercatcher ( Haematopus moquini

2.3.1Give the name of the rocky shore zone in which the African Black Oystercatcher is found when feeding on black mussels. (1\

2.3.2Discuss ONE advantage of predation on the populations of prey species living in rocky shore ecosystems. (1 x 2\ (2\

2.3.3Describe ONE biotic factor that black mussels have to deal with OTHER than predation. (1 x 2\ (2\

2.3.4Discuss the impact that the i ncreased poaching of black mussels would have on Black Oystercatcher numbers (2\ (7\ 12

Q3— Section header —

3.1Read the infographic about the Knysna Estuary below and the data in the table. nswer the questions that follow. KNYSNA ESTUARY The Knysna Estuary is located in the Western Cape on the southern coast of

3.1Explain ONE potential impact that speedboats might have on the animals living in the Knysna

3.1Compare the environmental impact of the rowing boat AND the et uggest a measure that SANParks

3.1Study the data in the table o you think that the issuing of permits is enough to reduce the effects of overtourism? Justify your answer. (2\ 13

3.1The Knysna area has experienced increased rainfall over a short period of time. This rainfall caused the finer sediment along the riverbanks to wash into the Knysna Estuary. This phenomenon resulted in the deposition of this finer sediment at the locations

3.2Read the extract seal whiskers below and answer the questions that follow. THE WHISKERS OF A SEAL As animals move in water, swirls are created in the water. The seal's whiskers are designed to vibrate up and down, over and under these

3.2.1Describe how the position of the seal s whiskers is suitable for its function.

3.2.2Explain how the ability of seals to sense other swimming animals is beneficial for the seal. (2\

3.2.3Engineers are closely examining the design of a seal s whiskers in an effort to design underwater sensors. Discuss how an underwater sensor that is inspired by the design of a seal s whiskers can benefit a marine rescue

3.3Read the extract below and answer the questions that follow. NAMAQUA NATIONAL PARK MARINE PROTECTED AREA The Namaqua National Park Marine Protected Area (MPA\ is the only MPA along the Northern Cape coastline. This

3.3.1Give ONE example of a potential stakeholder who ould have been involved in the establishment of the MPA AND give a reason why is stakeholder ould have been involved. (1 x 2\

3.3.2State TWO benefits of this area being a National Park. (2\

3.3.3Discuss how the protection of the Cape Hake nursery can economically benefit the local community around this MPA

3.3You have been tasked to monitor the health of the Heaviside Dolphin population for this MPA. Using your knowledge of marine mammals, identif ONE variable

Q3— Section header —

Q4— Section header —

Q5— Section header —

Topics Identified

Cell BiologyGeneticsEvolutionEcologyHuman Physiology

Mark Allocation

Total150 marks

Sections35 + 35 = 70 marks

Key Information

Contact Number0000000000 · 0001111000

Websitewww.theguardian.com · www.youtube.com

Paper information

SubjectMarine Sciences

Year2025

SessionNovember

TypePast Paper

PaperSee title

LanguageEnglish

Pages17

Downloads13

Examination context

Decade2020s

Years ago1y

SeasonSpring (SH)

Start dayWednesday

Exam periodNovember 2025

Days since exam356

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