life sciences Memo 1 (English)

Feb-March 2015 — Grade 12 / Matric — life sciences

Memo 2015 Grade 12 English Life Sciences Hub →

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🎯 150 marks 📄 11 pages 📝 31 items found 📚 3 topics

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Q1— Section header —

1.1.10(10 x 2\

1.2.1Eustachian tube

1.2.2Carbon footprint

1.2.3The rmal pollu tion

1.2.4Aqueous humour

1.2.5Oestrogen

1.2.6Luteinising hormone /LH

1.2.7Cristae

1.2.8TSH /Thyroid stimulating hormone

1.2.9ternal fertilisation

1.2.10Accommodation (10 x (10\

1.3.6B only B only A only B only None A only x 2\

1.4permatogenesis estis (a\3 (b\3 Crossing over Random assortment of chromosomes any order\ (Mark first TWO only\ Sperm cells

Q2— Section header —

2.1(a\ Epididymis (b\ Testis (c\ Vas deferens /sperm duct (1\ (1\

2.1.2Stores sperm cells (Mark first ONE only\

2.1.4Sperm cells will not pass to urethra o fertilise the egg and hence he will not be able to have children The virus may still be passed

2.2Sound waves are directed by the pinna throu gh the auditory canal to the tympanic membrane / eardrum ausing it to vibrate The vibrations of the tympanic membrane are transferred to the ossicles

2.3.6A reflex action is a rapid , automatic response to a stimulus (a\ Synapse (b\ Inter neuron /connector neuron

0.25g/cm minutes Blood glucose level of a person with diabetes mellitus is higher than that of a normal person at all times

3.1.2The process by wh ich the human body is able to maintain a constant internal environment (a\ idney (b\ drenal gland

3.1Walls of renal tubules become more permeable allow ing for a greater re absorption of odium ions from the filtrate into the blood capillaries

3.2.4Low number of species /low biodiversity Addition of phosphates caused eutrophication which led to an in crease in algal growth / algal bloom

Q3— Section header —

3.3.1China: 23/100 x 360 = 82.8 European Union: 13/100 x 360

6.8USA: 19/100 x 360 = 68.4 India and Russian Fed eration: 12/100 x 360 = 43.2 Other: 33/100 x 360

3.3.2NOTE: If the wrong type of gr aph is drawn: marks will be awarded for caption only Lead to the enhanced

3.3.3It will be expensive to change to machinery that produce less Too expensive to purchase or develop systems that remove excess CO from outlet gases Thi s will reduce profit

3.4Treatment of plant shoot Same type of plant Placed in the same environment Same amount of time Tip removed at the same length Same concentration of auxins Same type of agar Mark first TWO only

Q4— Section header —

Topics Identified

Cell BiologyGeneticsEcology

Mark Allocation

Total150 marks

Sections40 + 40 = 80 marks

Paper information

Subjectlife sciences

Year2015

SessionFeb-March

TypeMemo

PaperPaper 1

LanguageEnglish

Pages11

Downloads6

Examination context

Decade2010s

Years ago11y

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 1 (English) →

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