Life Sciences Paper 2 (English)

Feb-March 2016 — Grade 12 / Matric — Life Sciences

Past Paper 2016 Grade 12 English Life Sciences Hub →

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🎯 150 marks 📄 4 pages 📝 44 items found 📚 4 topics 🔑 1 key info

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Q1— Section header —

1.1Various options are provided as possible answers to the following questions. Choose the correct answer and write only the letter (A to D\ next to the

1.1.10\in the ANSWER BOOK , for example

1.1.11D.

1.1.1Which ONE of the following combinations results in genetic variation in organisms? Mitosis; sexual reproduction

1.1The inheritance of one trait does not depend on the inheritance of another trait

1.1.3In bees females are diploid and males are haploid. Females and ales produce haploid gametes. This means that

1.1.4In mice, the genotype yy produces grey fur and Yy produces yellow fur. The genotype YY results in death during the early embryonic stages.

1.1The diag ram below shows the blood types of two parents

1.1.7The structure of DNA was determined by using ray pictures

1.1.5The diagram below shows crossing over. Which ONE of the following combination of alleles would be present in chromatid after crossing over occurred at point

1.1.8Brown eye colour in humans is dominant over blue eye colour. A man with brown eyes marries a woman with blue eyes. They have a son with brown eyes and a daughter with blue eyes.

1.1.9possible explanation for an observation that can be tested is known as a ..

1.110 Com mon structural characteristics between groups of dinosaurs were used to construct the phylogenetic tree below. The two groups of dinosaurs with the most characteristics in common are

1.2Give the correct biological term for each of the following descriptions. Write only the term next to the question number (1.2.1 to

1.210 in the ANSWER BOOK

1.2.10The type of inheritance where the dominant allele mask the expression of the recessive allele in the heterozygous condition The p rocess by which genetically identical organisms are formed using biotechnology

1.3Indicate whether each of the statements in COLUMN I applies to A ONLY B ONLY BOTH A AND B or NONE

1.3the ANSWER BOOK COLUMN I COLUMN II

1.3.1Reproductive isolating mechanisms in plants A: B: Flowering at different times of the year Adaptation to different pollinators

1.3.2Evidence for evolution A: B: Biogeography Fossil record

1.3.3Found in African apes and humans A: B: Claws instead of nails An opposable thumb (3 x 2\ (6\ Life Sciences/P2

1.4The size and colour of unripe fruit in a plant species is genetically controlled. The allele for small fruit ( \is recessive to the allele for big fruit ( \The allele for yellow fruit colour (

1.4.1State: (a\ (b\ The phenotype of the plant with the genotype BbG ALL possible genotypes of the gametes produced by the plant mentioned

Q1— Section header —

1.4.2In a cross between two plants with genotypes BBGG and bbgg what percentage of the offspring will be homozygous for both characteristics?

1.5.2abel structure and How many chromosomes are present in

1.5.5Give only the LETTER of the diagram that represents naphase II.

Q2— Section header —

2.1Scientists want ed to determine which type of inheritance accounted for most of the selected genetic disorders in dogs. To

2.1.1

2.1.5If 000 dogs were studied in this investigation how many dogs had disorders

2.2In dogs rough hair ( \is dominant to smooth hair (

2.4.3Name ONE source of stem cells Explain why the characteristics of stem cells make them useful in treating some disorders Explain ONE possible advantage of

Q3— Section header —

3.1Errors that occur during DNA replication may sometimes lead to mutations

3.1.2Describe DNA replication Describe how an error in DNA replication may lead to a gene mutation.

Q3— Section header —

3.3Describe how a new species is formed through geographic isolation. (6\ Research, using DNA evidence, suggests that all modern humans arose from a single group of Homo sapiens that migrated from Africa 2

3.5The pedigree diagram below shows the pattern of inheritance of a certain genetic disorder controlled by a recessive allele. The dominant allele is represented by and the recessive allele by

Q4— Section header —

Topics Identified

Cell BiologyGeneticsEvolutionEcology

Mark Allocation

Total150 marks

Sections40 = 40 marks

Key Information

Websitewww.instituteofcaninebiology.org

Paper information

SubjectLife Sciences

Year2016

SessionFeb-March

TypePast Paper

PaperPaper 2

LanguageEnglish

Pages14

Downloads5

Examination context

Decade2010s

Years ago10y

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

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➗ 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 marking memorandum

Marking memorandum available

Use the corresponding memorandum after completing the paper to review your answers and identify areas that require further revision. The memorandum shows the marking approach used by DBE examiners, including method-mark allocations.

Life Sciences Memo 2 (English) →

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