life sciences Memo 2 (English) version 2

Feb-March 2012 — Grade 12 / Matric — life sciences

Memo 2012 Grade 12 English Life Sciences Hub →

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🎯 150 marks 📄 11 pages 📝 47 items found 📚 5 topics 🔑 1 key info

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Q1— Section header —

1.11.1.1

1.2.6Biodiversity Continental drift (6)6

1.31.3.1

1.3.7A only /A and B/Both /A and B/Both A only B only /A and B/Both

1.21.2.1 Non-biodegradable

1.2.2Biogeography

1.2.3Extinct

1.2.4Vestigial /vestige

1.2.5/A Both A and B Both A and B /A Both A and B /A and B/Both /B Both A and B

1.41.4.1 Jurassic period (1\

1.4.2- In the beginning of the Tert iary Period the number of reptile species was large - and decreased - Towards the end of the Tertiary Period the number of reptile - In the beginning of the Tert iary Period the number of mammal

1.4.3Fish (2\

1.4.4Birds are more closely related to reptiles . They share a(n\ (3\

1.51.5.1

1.5.5- Wear rubber gloves when taking the samples so as not to get contaminated with germs to avoid stepping too close to the river bank/prevent drowning/falling into

Q2— Section header —

2.1.5and the and the tree trunks will be lighter /less dark and therefore more visible to predators /dark moths are not

2.12.1.1 80

2.1.2As we move away from

2.1.3Since industrial and lichens grow

2.1.4The number of white moths will increase number of black moths will decrease - Less pollutants will be released - The light moths are less visible / while the dark moths will be - And will suffer a lower/higher mortality

2.22.2.1 An increase/decrease in t will result in an increase/decr ease in the percentage germination An increase/decrease in the concentration of sodium disulphate

2.2.2Concentration of sodium disulphate (1\

2.2.3Temperature Mark first TWO only\ (any\

2.2.4To determine the average estimate which increases reliability (2\

2.2.5

2.2.6When oats seeds were germi nated in 0,00% concentration of sodium disulphate germination percentage was high ation of sodium disulphate

2.3.1Natural selection (1)1

Q3— Section header —

2.3.2As a resu The cact /genotype for thorns were passed on to subsequent ions. (any\5\

Q3— Section header —

3.1.2The bones are long /thin and therefore light to enable the bat to fly The thin membrane forms a wing (2\ (4\

3.2

3.2.2(Mark first FOUR only (any 4 x 2\ 1 mark for table (9\ Gorilla/A Modern human/B 1. Canines well developed /form fangs 1. Canines not well developed 2. Flat face

3.2.5of the environment in sensing danger /carry objects or /lose body heat to surroundings in hot conditions/reduce overheating

3.43.4.1

3.4.4mya 98,6

3.2.3- Allows total awareness /looking for food - Enables hands to be free to use implements offspring/throw/protect - Exposes a large surface area for thermo-regulation - Display of male/female sex organs

3.3Uranium will be used, because dinosaurs lived 66 million years ago and carbon-14 can only measure up to 5730 years ago Chimpanzee (2\ SECTION C

Q4— Section header —

4.1

4.1.3Herring population shows a sharp decline and then a steady decline and then a small increase

4.24.2.1

4.2.3Testical tumours Enlargement of prostate gland Constipation HIV/AIDS

4.1.2from year 1 to 2 until year 7 /limited - Education and awareness of endangered species Mark first TWO answers only\ (any\ Urinary infections (Mark first TWO only\ - done to look at reproductive cycle

4.3- Utilise the heat generated generate electricity thus saving on the electricity bill (any)

Topics Identified

Cell BiologyGeneticsEvolutionEcologyAnimal Behaviour

Mark Allocation

Total150 marks

Sections30 + 30 = 60 marks

Per-question sum229 marks

Key Information

Contact Number0 123456789

Paper information

Subjectlife sciences

Year2012

SessionFeb-March

TypeMemo

PaperPaper 2

LanguageEnglish

Pages11

Downloads5

Examination context

Decade2010s

Years ago14y

Season—

Start day—

Exam period—

Days since exam—

About life sciences examination preparation

Grade 12 Life Sciences combines biological knowledge with interpretation and scientific reasoning. Paper 1 covers molecular biology, genetics, and cell biology, while Paper 2 tests human physiology, ecology, and evolution.

Every available Grade 12 Life Sciences past paper and memorandum is collected in the Life Sciences hub at life-sciences.freemode.co.za — browse all years, sessions and languages in one place.

How to use this resource for revision

A past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?

For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

recalling biological concepts

applying knowledge to unfamiliar situations

interpreting diagrams and information

using scientific terminology

constructing precise written responses

A practical revision approach

Life Sciences rewards exact biological terminology — examiners deduct marks for paraphrased definitions. Create a glossary of key terms and practice using them in context.

Grade 12 subject hubs

Each matric subject has its own dedicated hub on Freemode with every past paper and marking memorandum we have archived for that subject.

➗ Mathematics View papers → 📊 Mathematical Literacy View papers → ⚗️ Physical Sciences View papers → 🧬 Life Sciences 📍 You are here 📒 Accounting View papers → 💼 Business Studies View papers → 📈 Economics View papers → 🌍 Geography View papers → 🏛️ History View papers → 📖 English View papers → 🇿🇦 Afrikaans View papers → 🗣️ IsiNdebele View papers → 🗣️ IsiXhosa View papers → 🗣️ IsiZulu View papers → 🗣️ Sepedi View papers → 🗣️ Sesotho View papers → 🗣️ Setswana View papers → 🌾 Agricultural Sciences View papers →

Corresponding examination paper

Examination paper available

Open the corresponding examination paper to practise the questions before reviewing the marking memorandum on this page. Attempt every question under timed conditions for the most realistic preparation.

life sciences Paper 2 (English) version 1 →

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