Life Sciences Memo 2 (English)

November 2018 — Grade 12 / Matric — Life Sciences

Memo 2018 Grade 12 English Life Sciences Hub →

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🎯 150 marks 📄 9 pages 📝 38 items found 📚 3 topics

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Q1— Section header —

1.1.9x 2\

1.2.1Hydrogen

1.2.2Genome

1.2.3Cultural evidence

1.2.4Speciation

1.2.5Haemophilia

1.2.6Foramen magnum

1.2.7Alleles

1.2.8Discontinuous variation

1.2.9Gonosomes (9 x 1\ (9\

1.3.3A only Both A and B A only x 2\ (6\

1.4.2Chromatid Centromere pairs (2\ (1\

1.5.4Phylogenetic tree / cladogram exoskeleton (a\ (b\ (a\ Trilobites (b\ Helmetids

1.4.3(a\ (b\ (1\ (1\

1.4.4(a\ (b\ (c\ Nucleus Mitochondrion (Mark first TWO only\ Double helix Replication

Q2— Section header —

2.1.2Gamete will have 24 chromosomes /an extra chromosome and when it fertilises a normal ovum /gamete with 23 chromosomes the zygote will have 3 chromosomes at position 21 / 47

2.2.2He in herited the recessive allele from the mother /individual

2.1.1Due to non disjunction Non separation of a chromosome pair during Anaphase Two chromosomes moved to the one pole and none moved to the other pole

2.1.3(a\ Prophase (1\ (b\ Adjacent chromatids of homologous chromosomes cross at a point called the chiasma There is an exchange of DNA segments /genetic material (3\

2.2.1(a\ (b\ (c\ Female without SCID Male with SCID (1\ (1\ (2\

2.4Purple (1\

2.3.1(a\ (b\ It allows for the production of organisms with desired characteristics

2.3.4LMJC had a high average milk production yield produced 78 litres per day / had the

2.4purple flowering plants and white flowering plants are crossed all the offspring have

2.4Phenotype Purple Purple Genotype Meiosis /gametes D, d Fertilisation Genotype

3.1.2The jaw is in the chimpanzee and small Homo sapiens The jaw palate is rectangular in the chimpanzee

3.1.3(a\ A transitional species shows intermediate characteristics between two genera/species It has

Q3— Section header —

3.2.2The bright colour pattern is associated with being poisonous thus reducing predation and mprov ing the

3.3.31900 x 100 = 400 = 400 Natural selection Artificial selection The environment or nature is the selective force Humans represent the selective

3.4.1They invade farm fields They outcompete the crop plants for space Any

3.4(a\ (b\ Type of h erbicide Time taken for development of resistance (1\ (1\

3.4.3(a\ (b\ Dicloflop Trifluralin (1\ (1\

3.4(a\ (b\ They would apply the herbicide to the weed and observe if the weed survives over many generations They used the same weed species as other weed species

3.4Guideline for assessing the graph Type Bar graph drawn (T\ Title of graph Correct cale for

Q4— Section header —

Topics Identified

Cell BiologyGeneticsEvolution

Mark Allocation

Total150 marks

Sections40 + 40 = 80 marks

Paper information

SubjectLife Sciences

Year2018

SessionNovember

TypeMemo

PaperPaper 2

LanguageEnglish

Pages9

Downloads4

Examination context

Decade2010s

Years ago8y

SeasonSpring (SH)

Start dayMonday

Exam periodNovember 2018

Days since exam2,913

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) →

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