life science grade 11 assignment september 2017 memorandum

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Exam Papers and Study Notes for grade 10 ,11 and 12

Life Science(Grade 11)

Study notes.

 KZN March 2024   QP and Memo below

Past Year Exam  Papers

(updated 2024/03/25)

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Exam Guidlines 2024

KZN  March  QP and Memo

KZN March  QP and Memo

KZN SEPT QP and Memo

March QP and Memo

Limpopo June  QP and Memo

June  QP and Memo

SEPT  P1 only

NOV QP and Memo

April  QP and Memo

June  QP only

 March QP and Memo

March  QP and  MEMO  

Sept  QP and Memo

Nov  P1 and Memo

NOV P2 and Memo

MAR  QP and  MEMO

JUNE  QP and  MEMO

SEPT   P3   and MEMO

 SEPT  QP and  MEMO

 NOV  P1    and MEMO

NOV   P2   and MEMO

MARCH – QP+MEMO

JUNE  QP + MEMO

SEPT  P1  +MEMO

SEPT  P2  +MEMO

SEPT  QP+MEMO

SEPT P3  +MEMO

EC-NOV  P1 -only

EC-NOV  P1  MEMO

EC-NOV P2  only

EC-NOV  P2 MEMO

JUNE – QP+MEMO

 SEPT – QP+MEMO

NOV  P1 +MEMO

 NOV   P2 +MEMO

MARCH   QP + MEMO

SEPT  QP + MEMO

NOV  P1   + MEMO

NOV   P2   + MEMO

MARCH  QP + MEMO

JUNE   QP + MEMO

NOV   P1 + MEMO

 NOV P2 + MEMO

KZN STEP AHEAD GRADE 11 SOLUTIONS

Life Sciences Grade 11 Latest Assignment and Memos CAPS

Life Sciences Grade 11 Latest Assignment and Memos for CAPS Curriculum (Syllabus) South Africa: A National Curriculum and Assessment Policy Statement (CAPS) is a single, comprehensive, and concise policy document introduced by the Department of Basic Education for all the subjects listed in the National Curriculum Statement for Grades R – 12.  CAPS gives detailed guidance for teachers on what they should teach and how to assess.

On this page you will find Life Sciences Grade 11 Assignment and Memos for Term 1, Term 2, Term 3, and Term 4.

Table of Contents

Available Assignment and Memos Life Sciences Grade 11

Human Impact on the Environment Assignment:

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Download Life Sciences Grade 11 Previous Question Papers and Memos 2019

Download Life Sciences Grade 11 Previous Question Papers and Memos 2019: This page contains Grade 11 Life Sciences past exam papers and memos. You can browse and download question papers and memos for your revisions.

Life Sciences Grade 11 Question Papers 2018

LIFE-SCIENCES-P1-QP-GR11-NOV-2018_AfrikaansDownload

LIFE-SCIENCES-P1-QP-GR11-NOV-2018_EnglishDownload

LIFE-SCIENCES-P1-MEMO-GR11-NOV-2018_Afrikaans-1 Download LIFE-SCIENCES-P1-MEMO-GR11-NOV-2018_English-1 Download

Life Sciences Grade 11 Essays Topics

NUTRITION (DIABETES) – Blood glucose levels are controlled by two hormones: insulin and glucagon. These hormones are secreted by the pancreas. Discuss what happens in a healthy person and a person with diabetes

NUTRITION (DIABETES) Describe how the human body regulates the blood sugar level after a breakfast of maize soft porridge and suggest two ways in which diabetes mellitus can be controlled.

NUTRITION – Describe the digestion, absorption and assimilation of food that contains PROTEIN only

NUTRITION – Describe the digestion, absorption and assimilation of food that contains FATS only

NUTRITION – Describe the digestion, absorption, and assimilation of food that contains carbohydrates only. Also, describe the homeostatic control of glucose concentration of the blood in a normal healthy person

NUTRITION Describe the digestion and absorption of food that contains only carbohydrates. Also, describe the transport of the products of carbohydrate digestion, following their absorption (EC, Nov 2017)

PHOTOSYNTHESIS – Describe the process of photosynthesis from the time light is absorbed until carbohydrates are formed.

PHOTOSYNTHESIS Carbon dioxide id required in the dark phase of photosynthesis but is released during the Krebs cycle of cellular respiration. Describe the dark phase of photosynthesis and Krebs cycle of respiration and then explain the structural adaptations of the mitochondria for respiration’ (June 2017)

PHOTOSYNTHESIS Photosynthesis takes place within the chloroplasts of green plants. Explain THREE structural adaptation of chloroplast and describe the process of photosynthesis (June 2016)

PHOTOSYNTHEISS Describe the process of photosynthesis and explain how this process may be influenced by temperature (June 2015)

RESPIRATION – Describe how anaerobic respiration is involved in the food industry. Give at least two examples.

RESPIRATION Describe the different stages of aerobic respiration and explain how high levels of CO2 produced during strenuous exercise are reduced to normal in the human body.

RESPIRATION – Describe how the process of the LIGHT PHASE of photosynthesis is used to form a GLUCOSE molecule and how this molecule is then broken down in the cell of a plant to release energy

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On this page, we provide the historical perspective of photosynthesis summary. Title: The Historical Perspective of Photosynthesis: A Journey Through Time Photosynthesis, the process by which green plants, algae, and some bacteria convert light energy, primarily from the Sun, into chemical energy in the form of glucose, is the fundamental basis of life on Earth. … Read more

Life Sciences Grade 11 Term 1 March/ April 2022 Question Papers and Memo

Life Sciences Grade 11 Term 1 March/April 2022 Question Papers and Memo in pdf downloadable format: The papers below are for Life Sciences Grade 11 March/April exam tests which were obtained from Kwazulu Natal Province. Download the paper

Grade 11 Life Sciences (Biology) Study Guides Free Download (South Africa)

Grade 11 Life Sciences (Biology) Study Guide Free Download (South Africa). This page includes different free PDF Study Guides for download to help Grade 11 learners with their exam preparations and studies. The study guides include Mind the Gap (CAPS) and many others. Download Grade 11 Life Sciences (Biology) Study Guides Free Hello Grade 11 … Read more

Life Sciences Grade 11 Past Papers and Memos PDF Download (South Africa)

2022 Life Sciences Grade 11

2021 life sciences grade 11 past papers, memos and exam scope.

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2020 Life Sciences Grade 11 Past Papers and Memos

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• KZN-LFSC-G11-March-2020 Download

2019 Life Sciences Grade 11 Past Papers and Memos

• March Question Paper and Memorandum Download
• November Paper 1 Question Paper Download
• November Paper 1 Memo Download
• November Paper 2 Question Paper Download
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Discover Careers you can study at Universities with Life Sciences Subjects, Click Here

2018 Life Sciences Grade 11 Past Papers and Memos

Hello Grade 11 Learners. Modern Classroom has everything for you needed to pass your exams, tests, assessments, research tasks and assignments under CAPS Curriculum . Feel free to explore all resources for grade 11, such as Study Guides, DBE Past Exam Papers with Memos , and Speech Topics. That’s if you want to know how to pass grade 11 with distinctions in South Africa

Why passing Grade 11 is very important

Grade 11 ultimately prepares you for Grade 12. You regard Grade 11 as your last trial run for your Matric year because most of the work covered in the syllabus will prepare you for Matric anyway. Passing your Grade 11 very well, is usually a sign that you may pass very well in Matric.

What can you do with your Grade 11 marks in South Africa?

• You can apply at a South African University using your Grade 11 marks
• You can already apply for university bursaries using your Grade 11 marks

Other Grade 11 Subjects

• Accounting Grade 11
• Economics Grade 11  
• Mathematics Grade 11  
• Technical Mathematics Grade 11
• Physical Science Grade 11
• Technical Sciences Grade 11
• Mathematics Literacy Grade 11  
• Biology Grade 11  
• Life Orientation Grade 11  
• Religion Studies Grade 11  
• Business Studies Grade 11  
• Consumer Studies Grade 11  
• Tshivenda Home Language Grade 11  
• IsiXhosa Home Language Grade 11  
• IsiZulu Home Language Grade 11  
• Sepedi Home Language Grade 11
• Sesotho Home Language Grade 11
• Setswana Home Language Grade 11  
• Seswati Home Language Grade 11  
• Afrikaans Home Language Grade 11  
• English Home Language Grade 11  
• Xitsonga Home Language Grade 11  
• Tourism and Hospitality Studies Grade 11  
• Computer Applications Technology Grade 11  
• Civil Technology Grade 11  
• Electrical Technology Grade 11
• Engineering Graphics and Designs Grade 11  
• Information Technology Grade 11  
• Mechanical Technology Grade 11  
• Agricultural Sciences Grade 11  
• Agricultural Technology Grade 11  
• Agricultural Management Practices Grade 11  
• Dance Studies Grade 11  
• Design Grade 11  
• Dramatic Arts Grade 11  
• Music Visual Arts Grade 11  
• Geography Grade 11  

Life Science Grade 11 Photosynthesis Practical Question Papers (South Africa)

Life Science Grade 11 Photosynthesis Practical Question Papers (South Africa):

Photosynthesis is a process whereby light is converted into chemical energy. Sunlight is changed into the chemical energy of sugars and other organic compounds.

This process consists of a series of chemical reactions that require carbon dioxide (CO2) and water (H2O) and store chemical energy in the form of sugar.   Photosynthesis occurs in the chloroplast. It is an anabolic process and requires enzymes.

Grade 11 Photosynthesisi Revision

• Economics Grade 11  
• Mathematics Grade 11  
• Mathematics Literacy Grade 11  
• Biology Grade 11  
• Life Orientation Grade 11  
• Religion Studies Grade 11  
• Business Studies Grade 11  
• Consumer Studies Grade 11  
• Tshivenda Home Language Grade 11  
• IsiXhosa Home Language Grade 11  
• IsiZulu Home Language Grade 11  
• Setswana Home Language Grade 11  
• Seswati Home Language Grade 11  
• Afrikaans Home Language Grade 11  
• English Home Language Grade 11  
• Xitsonga Home Language Grade 11  
• Tourism and Hospitality Studies Grade 11  
• Computer Applications Technology Grade 11  
• Civil Technology Grade 11  
• Engineering Graphics and Designs Grade 11  
• Information Technology Grade 11  
• Mechanical Technology Grade 11  
• Agricultural Sciences Grade 11  
• Agricultural Technology Grade 11  
• Agricultural Management Practices Grade 11  
• Dance Studies Grade 11  
• Design Grade 11  
• Dramatic Arts Grade 11  
• Music Visual Arts Grade 11  
• Geography Grade 11  

• Grade 11 – Past Papers (All Subjects)

Grade 11 NSC Past Papers & Memos: Life Sciences

by Development Team · December 23, 2021

Are you in need of Grade 11 NSC Past Papers & Memos: Life Sciences ? After a number of requests, Physics101 has decided to not only put up past papers but all respective subjects to assist students, as well as study guides. Enjoy the past Papers Available for Download.

See the downloadable link below for your required past exam paper with the memorandum. These past papers are for learners in Grade 11. Go ahead and click on the following link(s) below in order to download the required . Grade 11 NSC Past Papers & Memos.

Please note: These question papers and their respective memorandums are free for public use. In no way are the provided papers for sales or distribution for coursework.

Physics101 will also not partake in requested student essays or assist others in doing student work for remuneration. Our website strives to make complex information, simple to understand for the general public. Please see below Grade 11 Past Papers & Memos.

Grade 11 NSC Past Papers & Memos: Life Sciences

Life sciences – grade 11 – 2018, life sciences – grade 11 – 2019, life sciences – grade 11 – 2020.

Our development team hope you enjoy the content provided. Please leave us a comment below should you have any queries or concerns. This content is designed to assist the  end-user with the Department of education syllabus.

Please note: Should you not be able to find the necessary memorandum for the desired question paper. Please take the question paper to your teacher and discuss the complex concepts in more detail.

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Life Sciences

Most of the exam papers are available in English and Afrikaans

Summaries for Gr 11 Life Sciences

No June Exams was written due to covid

“You need [webcam] setup. You could point the webcam away from you but still see the screen. That is what I would change for the next session.”

Clarity of instruction

Instructors commented on the need for clear and concise teaching instructions when leading the break-out group practicals; they could not rely on tactile feedback and non-verbal communication, which would have occurred during a face-to-face session.

“I felt that I had to make sure that my instructions were a lot clearer because there wasn’t the ability to use tactile cues to assist the students.”

Two instructors suggested capping the instructor-to-student ratio (to four students) in each breakout room and to reconvene with the same instructor for each practice to build relationships with students and gain a better understanding of their learning needs in order to better support them. Instructors also reported a relationship between student motivation and student acquisition of skills.

“If you have the same group you build up a bit more rapport and [students] get to know you.”

“[Acquisition of skills] depended on how motivated each candidate was. Some were very motivated and got on with the activity and acquired the skills but some were maybe not motivated enough or maybe feeling frustrated that they were not getting it, and it was difficult for me to motivate them virtually.”

Accessibility and individualized learning

Students were able to attend and engage in the session remotely, even those who were not based in the UK. An important feature of online learning is that the view of the demonstration is the same for all students, which is not always possible in face-to-face teaching.

“Because we created videos for them to watch, and as they can ‘pin’ my video when I’m doing live demonstrations, the view is much more equitable for everyone.”

“It meant that fewer students were left out…we were able to have a global reach with many of the [students] taking the module outside of the UK.”

“[Students] were provided with equipment and resources to keep at home and so they have the opportunity for more hours of practice.”

Individualized learning describes an instructor’s ability to respond to an individual student’s learning needs. This was achieved with the use of the ‘pin video’ function on Zoom® to enlarge the view, and observe and instruct students one at a time. A student’s individual concerns and identified learning needs were more easily addressed in small group breakout practical sessions.

“Having breakout room facility [was comparable to face-to-face instruction] to help students on a more individual basis, and to help them acquire the skills.”

The UCL Ophthalmology Masters curriculum was transferred to predominantly online teaching in response to the COVID-19 outbreak. Lecture-based teaching was easily transferable for online delivery however, virtual teaching of clinical and surgical skills sessions required significant pedagogical consideration and planning. A recent editorial stressed the importance of in-person ophthalmic simulation training for the maintenance of surgical skills and competence [ 10 ]. Here we discuss the findings from our virtual ophthalmic surgical skills session and the purposeful steps taken to ensure successful online delivery to a diverse interprofessional student group. We note that these steps can also be utilized to teach generic surgical skills and are not exclusive to ophthalmic surgical skills training. General tips for course preparation and delivery are outlined in Table  2 .

Overall, students rated the session 8.85 (±1.19) out of a scale from 0 to 10 (10 being most satisfied). Student perceptions of their ability to interact with tutors, level of supervision, and view of demonstrations positively changed following the teaching session, as did their confidence in instrument handling, knot tying, and suturing. In addition, students could continue to practice the skills after their session, as they had the surgical kit with them at home.

95% of our students were ‘very satisfied’ or ‘satisfied’ with the Zoom® platform used to deliver the teaching session. Other medical educators have also successfully used this platform to deliver surgical skills teaching [ 11 ,  12 ]. For our session, the Zoom® platform was used to deliver presentations, play instructional videos, as well as watching students perform the skills via breakout rooms. However, any online platform with similar capabilities would suffice.

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Life Science Grade 11 Government Past Papers Available With Memos

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Life Science Grade 11 Exam Papers and Memos 2023 pdf download

Download life science grade 11 exam papers and memos 2023 pdf.

Looking for Life Science Grade 11 Exam Papers and Memos? You’ve come to the right place. Aucfinder offers the latest official Memorandum, Past Paper, and Sample Test from the Department of Basic Education for free. You’ll also find a detailed explanation for each question together with answers and mark schemes.

If you’re taking Life Science this school year, we have everything you need to succeed including exam prep materials and past papers. These resources will give your insight into what is tested on this subject. They will help you understand the concepts and ideas that are being tested so that you can put in more time preparing for your exams.

Stand out from your classmates by getting these resources now!

Table of Contents

How to access Life Science Grade 11 Exam Papers and Memos 2023

There are a few ways that you can access Life Science Grade 11 past Papers and Memos for the year 2023.

One way is to visit your local Department of Education website and download the Grade 11 Life Science Paper and Memorandum Pdf from them.

Another way is to search for the papers online. A quick Google search should bring up a few options for you to choose from. Finally, you can also ask other students or teachers for copies of the papers.

However, it is important to note that these papers and memos are not always the most up-to-date or accurate. For example, the papers and memos from 2017 may not accurately reflect the current curriculum. It is always best to visit your local Department of Basic Education website to get the most accurate and up-to-date information.

Download Grade 11 Life Science Papers and Memorandum Pdf

Life Science Grade 11 Exam Papers and Memos for 2023 can be downloaded below. These papers and memos are essential for any Grade 11 Life Science student, as they provide valuable practice for the upcoming exams.

Grade 11 Life Science Papers and Memorandum Additional Resources

To help you prepare for your upcoming exam, we have also compiled a list of helpful Grade 11 Life Science Papers and Memorandum Pdf resources.

• Department of Basic Education Grade 11 Exams
• Eastern Cape Papers and Memorandum
• Free State Papers and Memorandum
• Gauteng Papers and Memorandum
• KwaZulu-Natal Papers and Memorandum
• Limpopo Papers and Memorandum
• Mpumalanga Papers and Memorandum
• Northern Cape Papers and Memorandum
• North West Papers and Memorandum
• Western Cape Papers and Memorandum

Final words

There are a few things to keep in mind when looking for Life Science grade 11 exam papers and memos.

First, make sure that the papers and memos are from reputable sources. There are a lot of websites out there that claim to have the most up-to-date and accurate information, but many of them are actually scams.

Second, take the time to read through the papers and memos before using them. This will help you to get a better understanding of the material and how it is supposed to be used.

Finally, make sure to practice with the papers and memos before the actual exam. This will ensure that you are fully prepared and will not be caught off guard by any of the questions.

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LIFE SCIENCES GRADE 12 PAPER 1 QUESTIONS - NSC PAST PAPERS AND MEMOS SEPTEMBER 2017

LIFE SCIENCES GRADE 12 PAPER 1  NSC PAST PAPERS AND MEMOS SEPTEMBER 2017

INSTRUCTIONS AND INFORMATION  Read the following instructions carefully before answering the questions.

• Answer ALL the questions. 
• Write ALL the answers in your ANSWER BOOK. 
• Start the answers to EACH question at the top of a NEW page. 
• Number the answers correctly according to the numbering system used in this  question paper. 
• Present your answers according to the instructions of each question.
• ALL drawings must be done in pencil and labelled in blue or black ink.
• Draw diagrams, flow charts or tables ONLY when asked to do so.
• The diagrams in this question paper are NOT necessarily drawn to scale.
• Do NOT use graph paper.
• You must use a non-programmable calculator, protractor and a compass  where necessary.
• Write neatly and legibly. 
• Round off all calculations to two decimals after the comma.

SECTION A  QUESTION 1  1.1 Various options are provided as possible answers to the following questions.  Write down the question number (1.1.1–1.1.10) and choose the answer by writing the letter (A–D) next to the question number (1.1.1–1.1.10) in the  ANSWER BOOK, for example 1.1.11 D.  1.1.1 Before copulation the male sperm is stored temporarily in the … 

• seminal vesicles.
• prostate gland.
• epididymis. 

1.1.2 An increased growth of algae due to too many nutrients in the water is  known as … 

•  bleaching.
• eutrophication.
• ionisation.

1.1.3 The photoreceptors stimulated by dim light: 

• Lens and rods
• Rods and cones

1.1.4 The average length of human gestation (from fertilisation to birth) is … 

QUESTION 1.1.5 AND QUESTION 1.1.6 REFERS TO THE  DIAGRAM BELOW. THE DIAGRAM REPRESENTS THE HUMAN  BRAIN AND PART OF THE SPINAL CORD. 

1.1.5 Which part of the brain is associated with balance and co-ordinating  muscle movement? 

1.1.6 Which part controls rate of breathing and heartbeat? 

1.1.7 During the development of the embryo the function of the amnion is  to … 

• serve as reserve food.
• give rise to the placenta.
• prevent the developing foetus from moving about.
• hold the fluid which protects the embryo against injury. 

1.1.8 Which ONE of the following features of genetically modified crops has  the potential of improving food security?  GM crops … 

•  increase the number of alien plant species.
• increase yield.
• increase the reliance on pesticides. 
• decrease genetic diversity. 

1.1.9 Parents will often tell children NOT, for even a few minutes, to stare at  the sun because … 

• bright light causes damage to the retina.
• the bright light will damage the lens.
• it dries out the aqueous humour.
• the light energy changes to heat energy in the eye. 

1.1.10 One of the functions of hormone, progesterone, is to … 

• prepare the uterine wall for implantation of the embryo.
• speed up the development of the follicles. 
• bring about the formation of the corpus luteum.
• stimulate the secretion of sweat. (10 × 2) (20) 

1.2 Give the correct biological term for each of the following descriptions. Write  only the term next to the question number (1.2.1–1.2.10) in the  ANSWER BOOK. 

1.2.1 A process by which a molecule of DNA forms a copy of itself  1.2.2 The structure in the head of a sperm cell that contains enzymes which  break down the membrane surrounding the ovum  1.2.3 The division of cytoplasm during the process of meiosis  1.2.4 A change in the internal or external environment that will be detected  by a receptor and converted into an impulse  1.2.5 The replanting of trees and shrubs in a forest  1.2.6 The hormone which is responsible for development of secondary sexual  characteristics in males  1.2.7 A layer of earth or rock that holds water  1.2.8 Structures found only in animal cells and lower plant cells that form the  spindle during cell division  1.2.9 Process by which a region becomes progressively drier and drier  1.2.10 That part of the nervous system which consists of cranial and spinal  nerves (10 × 1) (10)

1.3 Indicate whether each of the statements in COLUMN І applies to A ONLY,  B ONLY, BOTH A and B or NONE of the items in COLUMN ІІ. Write A only,  B only, Both A and B or None next to the question number (1.3.1–1.3.3) in the  ANSWER BOOK. 

• The type of cell division (mitosis or meiosis) in which this process  takes place (1)
• The process taking place at C (1) 
• The phase in which the process mentioned in QUESTION 1.4.1(b)  takes place (1) 
• The structure that holds the two chromatids together (1)
• The region marked F (1)
• The phase that follows the phase represented in the diagrams  above (1) 

1.5.1 What type of dump site is shown by the photo? (1) 1.5.2 Name a useful gas that may be obtained from this type of dump site. (1) 1.5.3 Give ONE use of the gas mentioned in QUESTION 1.5.2. (1)  1.5.4 State the name of the process where products from this dump site are  collected to be re-used again. (1)  1.5.5 Name ONE of the waste components that cannot be decomposed by  natural methods. (1)  1.5.6 Give the collective name given to gases causing global warming. (1)  1.5.7 Identify a health risk that poor management of this dump site can have  on the community living close by. (1) 

TOTAL SECTION A: 50

SECTION B  QUESTION 2  2.1 The diagram shows two eyes (X and Y) focused on objects (represented by  arrows) at different distances from the eye. Objects A and C were 3 metres  away from the eye. Objects B and D were 8 metres away from the eye.  NB: The diagrams are not drawn to scale 

2.1.1 Write down the LETTER ONLY of the object that:  

• Eye Y is focused on (1)
• Eye X is focused on (1) 
• Name the eye defect which results from the inability of the Eye Y to focus on Object D. (1) 
• Name the type of lens used to rectify the defect mentioned in  QUESTION 2.1.2(a). (1) 

The blood glucose level is regulated to a range of 70–110 mg per 100 mℓ blood in a normal person. If it rises above this level for an extended period the  person may have diabetes mellitus. 

2.2.1 Name the chemical substance secreted by the pancreas that will ensure  that the glucose level in a healthy person is not higher than 110 mg per  100 mℓ blood. (1)  2.2.2 Explain how the malfunctioning of the pancreas will affect the  maintenance of the correct level of glucose in the blood. (3)  2.2.3 Explain the possible negative influence on the body cells if the glucose  level is above 110 mg per 100 mℓ blood for a long time. (2) 

2.3 A Grade 12 learner performed an investigation to determine the effect of light  on the growth of plant shoots. The learner divided the plants that were used into  three groups as follows: 

• Group A The tip of the shoot was intact.
• Group B The tip of the shoot was removed.
• Group C The tip of the shoot was covered by a cap that does not allow light  to pass through. 

2.3.1 Name the dependent variable in this investigation. (1) 2.3.2 Which plant hormone is being investigated in this experiment? (1) 2.3.3 State TWO factors that must be kept constant during this investigation. (2) 2.3.4 Explain the results observed in: 

• investigation A (3) 
• investigation C (3) 

2.3.5 State TWO ways in which the learner could improve the reliability of this  investigation. (2) 

2.4.2 State ONE the function of each part: 

2.4.3 Explain why the brain is not initially involved in a reflex action shown  above. (3)  2.4.4 Explain what the effect will be, in the action shown in the diagram  above, if a person is suffering from multiple sclerosis. (2)  2.4.5 Explain the effect on the body if the part labelled D is cut/severed. (4)

QUESTION 3  3.1 The diagram below shows the development of an ovum in an ovary of a female.  2n and n refer to the chromosome number (2n is diploid and n is haploid). 

3.1.1 Name the processes taking place at:  

3.1.2 Explain the effect on the ovarian cycle shown above if a contraceptive  containing progesterone is injected before the cycle starts. (3)  3.1.3 Describe the changes that occurs from 1 to 2 in the diagram under the  influence of hormones. (6) 

3.2 Records of human fertility for the period 1941 to 1990 have shown changes in  the sperm count of normal men. The table below summarises the changing  percentages of men with high or low sperm count over a period of 50 years. 

3.2.1 During which time period was there: 

• The highest percentage of men with low sperm count (1)
• The lowest percentage of men with high sperm count (1) 

3.2.2 Calculate the percentage increase of men with low sperm counts from  1971 to 1990. (2)  3.2.3 Draw a bar graph to show the percentages of men with a high sperm  count for the period indicated in the table. (6) 

3.3.1 Give the letter of the part that absorbs extra pressure/vibration set up  in the cochlea. (1)  3.3.2 A surgeon place a tube called a “grommet” into the structure marked A.  Once in place the child should not go swimming. Explain this  instruction. (2)  3.3.3 Explain the significance of the positions of the structures labelled B. (3)  3.3.4 Name the tube connecting the middle ear to the throat and explain what  role it plays regarding pressure in the ear. (2) 

3.4 Study the extract below and answer the questions: 

3.4.1 From the passage, name the mineral found in mine dumps causing  ground water to be acidic. (1)  3.4.2 From the passage, describe the formation of acidic water in mines. (2) 3.4.3 Explain how acid mine drainage could affect: 

• The infrastructure in a nearby town (2) 
• Agricultural production on a nearby farm (2) 

3.4.4 Explain why abandoned gold and coal mines could affect food chains  in ponds/rivers/dams. (4)

[40]  TOTAL SECTION B: 80

SECTION C  QUESTION 4  A marathon runner took only 1 liter of water with him when he set off on a race on a  hot day. Describe the changes in his body to try to maintain normal body temperature.  Describe the role of the hypothalamus in regulating the water balance of his body. 

Content: (17)  Synthesis: (3) 

NOTE: No marks will be awarded for answers in the form of a charts or diagrams. 

TOTAL SECTION C: 20  GRAND TOTAL: 150

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