Marine Sciences Memo 2 (English)

November 2025 — Grade 12 / Matric — Marine Sciences

Memo 2025 Grade 12 English

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🎯 150 marks 📄 22 pages 📝 39 items found 📚 6 topics

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Q1— Section header —

1.2.1Echolocation

1.2.2Vertebral column

1.2.3Gill filaments

1.2.4Ecosystem services

1.2.5Diving bradycardia

1.2.6Infratidal

1.2.7Preen glands

1.2.8Nature based tourism

1.2.9Respiratory tree

1.2.10Operculum (10 x 1\ (10\

1.3.5Both A and A only None None B only (5 x 2\ (10\ TOTAL SECTION A:

Q2— Section header —

2.1.1Year Marine rotected rea/ No

2.1.2MARKING GUIDELINES CRITERIA MARK ALLOCATION Descriptive heading above or below graph ( Heading includes all variables:

2.1.3Lower survival rate/chicks have lower weight Parents would use more energy when diving deeper requiring more food themselves thereby less food for the chicks.

2.1Penguins employ diving bradycardia /respire anaerobically less energy is used by non essential organs

2.2.1The kelp provides cover for the male Cape Breams protecting them from predators whilst watching over their nests (2\

2.2.2Predation (1\

2.2(a\ Ovipary /spawning (1\ (b\ Is

2.2.4(a\ Brittlestars have no sense organs They have receptors on their arms whereby chemicals will be detected.

2.3.1Lower balanoid zone (1\

2.3.2Can control population size to prevent overcrowding /provide more space for juveniles More space for growth

2.3.3Competition The black mussels have to compete for space when they settle for food

2.3.4(Decrease in food source\will result in starvation */less energy Fewer breeding individuals Reducing breeding success (1 Compulsory

3.1.1Noise pollution caused by the speedboats could disrupt the breeding stages of animals/disorientate their movements/change behaviour patterns which could potentially cause animals to migrate out of the area

3.1Jet ki has a lower number of permits issued compared to the rowing boat more people using the area for rowing

3.1If learner said YES By reducing the number of permits issued for the area the number of tourist

3.1.4Influx of finer sediment will cause anoxic conditions /low oxygen in the sediment causing the burrowing animals that is used as bait to

3.2.1The seal s whiskers are positioned at the front /anterior end/ found on the outside allowing the seal to sense the environment before moving

3.2.2The seal will be able to sense the trail left behind by their prey able to identify the size of the prey/direction their prey is going in order for the seal to either go after the prey and hunt or stay.

3.2.3a\ The underwater sensors will be able to measure the speed of the current /the direction in which the person needing rescuing is going and send the rescue team to the

3.3.1Community members along the Northern Cape coastline /rate payers/organisations to ensure that they were informed and made aware of the conservation initiative. The local municipality

3.3.2Protecting /preserving habitats of fish species that are valuable in fisheries /the Cape Hake nursery areas. Allows for the recovery of the West Coast Rock Lobster.

3.3.3Increased abundance of adjacent yield /spill over effect/ increased fish stocks from the nursery Assisting with fisheries management to allow for the recovery of the fisheries industry in the local community

3.3(a\ (b\ Data collected such as the population size /distribution/ behaviour patterns of the Heaviside Dolphin By recording the frequency of dolphin sightings their feeding behaviours, and social interactions/aerial surveys/sound

Q4— Section header —

Q5— Section header —

Topics Identified

Cell BiologyGeneticsEcologyHuman PhysiologyRespirationAnimal Behaviour

Mark Allocation

Total150 marks

Sections39 + 35 + 35 = 109 marks

Paper information

SubjectMarine Sciences

Year2025

SessionNovember

TypeMemo

PaperPaper 2

LanguageEnglish

Pages22

Downloads7

Examination context

Decade2020s

Years ago1y

SeasonSpring (SH)

Start dayWednesday

Exam periodNovember 2025

Days since exam354

About Marine Sciences examination preparation

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File size389 KB

Pages22

Archived on7 September 2026

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