GRADE 11
LIFE SCIENCES
JUNE 2016
MARKS: 150
TIME: 2½ hours
This question paper consists of 17 pages.
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INSTRUCTIONS AND INFORMATION
Read the following instructions carefully before answering the questions.
1.
Answer ALL the questions.
2.
Write ALL the answers in your ANSWER BOOK.
3.
Start the answer to EACH question at the top of a NEW page.
4.
Number the answers correctly according to the numbering system used in this
question paper.
5.
Present your answers according to the instructions of each question.
6.
Draw all drawings in pencil and labels in blue or black ink.
7.
Draw diagrams or flow charts only when asked to do so.
8.
The diagrams in this question paper are NOT necessarily drawn to scale.
9.
Do NOT use graph paper.
10.
You may use a non-programmable calculator, protractor and compass where
necessary.
11.
Write neatly and legibly.
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SECTION A
QUESTION 1
1.1
Various 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
question number (1.1.1 to 1.1.10) in your ANSWER BOOK, for example
1.1.11 D.
1.1.1
All viruses are …
A. Unicellular and disease-causing
B. Acellular and non-living
C. Eukaryotes
D. Cellular in structure
1.1.2
In an ecosystem fungi are ...
A
B
C
D
Producers.
Consumers.
Decomposers.
Herbivores.
1.1.3
The chemical digestion of proteins in humans start in the...
A. Mouth
B. Oesophagus
C. Stomach
D. Small intestine
1.1.4
The following is a list of steps in a test for starch in green leaves:
(i) Immerse leaves in iodine solution
(ii) Boil leaves in water
(iii) Rinse leaves in water
(iv) Boil leaves in alcohol
Which is the CORRECT sequence of steps?
A. (i)
B. (ii)
C. (iii)
D.
(iv)
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(iii)
(iv)
(i)
(ii)
(ii)
(iii)
(iv)
(i)
(iv)
(i)
(ii)
(iii)
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1.1.5
A biologist discovered a new living cell with a distinct cell wall but
with no definite nucleus. The cell is likely to be that of a/an …
A. Animal
B. Plant
C. Virus
D. Bacterium
1.1.6
A group of simple organisms that do not fit in any other kingdom…
A. Viruses
B. Bacteria
C. Protista
D. Fungi
1.1.7
The four basic structural parts of most flowers are ...
A
B
C
D
1.1.8
Some animals are said to be hermaphroditic. What does this term
refer to?
A
B
C
D
1.1.9
petals, sepals, pistils and stamens.
calyx, corolla, ovules and pollen.
stamens, pistils, pollen and seeds.
petals, stamens, cotyledons and pistils.
A state in which one animal possesses both female-and male
reproductive organs.
A state in which a single species has both a sessile and motile
stage.
A state in which a single species has one type of symmetry as
an embryo and a different type of symmetry as an adult.
A species with the ability to reproduce by both sexual-and
asexual means.
A group of learners set up an investigation to test the effect of light on the rate
of photosynthesis. They counted the number of bubbles of gas given off by the
water plant as the lamp was moved away from the plant.
Which ONE of the following graphs best shows the expected results of the rate of photosynthesis?
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1.1.10
1.2.
Which of the following is the correct sequence starting from the beginning?
A. Ingestion, absorption, digestion, egestion
B Ingestion, digestion, absorption, egestion
C. Absorption, digestion, egestion, ingestion
D. Egestion, absorption, digestion, ingestion
(10x2)=20
Give the correct biological term for each of the following descriptions. Write only the term
next to the question number (1.2.1 to 1.2.8) in your ANSWER BOOK.
1.2.1. Wave-like motions of the wall of the alimentary canal which moves
food along the alimentary canal
1.2.2. The organic substance that will increase in the muscles during strenuous exercise
1.2.3. A disease caused by a diet high in carbohydrates and extremely low in proteins.
1.2.4. The general energy carriers in cells.
1.2.5. Type of respiration which requires oxygen.
1.2.6. The movement of molecules against a concentration gradient.
1.2.7. Plants that do not have true roots, stem and leaves
1.2.8 Finger-like projections in the wall of the small intestine for absorption
1.2.9. The phylum of all animals with a vertebral column in the adult
1.2.10. The final acceptor of hydrogen during cellular respiration.
(10X1)=10
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1.3
Indicate whether each of the statements in COLUMN I applies to A only, B only,
both A and B or none of the items in COLUMN II. Write A only, B only, both A
and B or none next to the question number (1.3.1–1.3.10) in the ANSWER BOOK.
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.3.7
1.3.8
1.3.9
1.3.10
COLUMN I
COLUMN II
The body’s response to the presence of
A: Immunity
disease-causing organisms before it has a B: Vaccination
chance to cause an illness
Symbiotic relationship in plants
A: Nitrogen fixing bacteria
B: E. Coli
Structure that receives the pollen
A: Ovary
B: Stigma
A traditional product formed by bacteria
A: Beer
B: Cheese
A substance found in the central part of a A: RNA
virus that affects animals
B: DNA
Sponges which have no tissues and A: Porifera
symmetry, are classified under this phylum
B Cnidaria
The part of the flower from which the fruit A: Calyx
develops
B: Corolla
Plants with long tube shaped flowers with A: Wind pollinated
no odour
B: Insect pollinated
Phase (s) in photosynthesis
A: Dark phase
B: Kreb Cycle
Factor(s) that increase(s) the rate of
A: CO2 and Humidity
photosynthesis.
B: Light intensity and Ph
(10x 2) (20)
TOTAL QUESTION 1:
TOTAL SECTION A:
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50
50
SECTION B
QUESTION 2
2.1 The diagram below shows the evolutionary relationships between animals
2.1.1 According to the diagram, name the FOUR characteristics that annelids and flatworms have
in common.
(4)
2.1.2 Identify the feature that evolved TWICE during the course of the animal evolution. (1)
2.1.3 The coelom was a major evolutionary advancement in animals
a) Discuss TWO advantages of the coelom to animals that posses it.
(2)
b) Suggest ONE challenge that a coelom poses and mention how it has been overcome
(2)
2.1.4 Describe the structure of the body plan of a diploblastic aceolomate animal.
(5)
2.1.5 Explain ONE way in which the coelom of annelids and arthropods are different. (2)
[16]
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2.2 Study the diagrams below showing the structures of two flowers as well as a pine cone. The
magnification of each flower is indicated in brackets.
2.2.1 Label parts D, E and F.
2.2.2 Which flower (A or B) is probably pollinated by insects?
2.2.3 Give ONE observable reason for your answer to QUESTION 2.2.2.
2.2.4 Which flower (A or B) is larger?
2.2.5 Identify the groups to which flower A and the pine cone belong.
2.2.6 State ONE way in which the seeds of the groups named in QUESTION 2.2.5 differs.
2.2.7 Explain how the dependency on water for reproduction is reduced in the group
represented by the pine cone.
2.2.8 State TWO advantages of seeds over spores.
2.3 Study the extract about malaria below
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(3)
(1)
(1)
(1)
(2)
(2)
(2)
(2)
[14]
2.3.1 To which group of micro-organisms does the malaria parasite belong?
(2)
2.3.2 State TWO ways to avoid contracting malaria.
(2)
2.3.3 Describe how the malaria parasite is passed from one human to another.
(2)
2.3.4 Give ONE reason why a person with malaria cannot be treated by using an antibiotic. (2)
2.3.5 Explain how an increase in the number of malaria infections would affect the South African
economy.
(2)
[10]
TOTAL QUESTION 2:
40
QUESTION 3
3.1 The following diagram illustrates some investigation carried out on photosynthesis. The plant
was kept in the dark for 48 hours before being placed in sunlight.
Study the diagram and then answer the questions that follow.
3.1.1 What is the aim of the investigation on:
a) Leaf A?
(2)
b) Leaf B?
(2)
c) Leaf C?
(2)
3.1.2 Why was the plant kept in the dark for 48 hours before being places in the sunlight?
(1)
3.1.3 Starch tests were carried out on the three leaves. Name the chemical reagent that was
used to test for the presence of starch.
(2)
3.1.4 Tabulate the results of the tests on leaf A, leaf B and leaf C.
(3)
[12]
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3.2 Study the diagram below, which shows part of the human digestive system, and answer the
question that follow.
3.2.1 Identify parts B and C
(2)
3.2.2 Name ONE major food type that is digested in organ A.
(1)
3.2.3 Briefly explain the function of part D with regard to the pH of the acid chyme that enters the
duodenum.
(2)
3.2.4 Describe THREE structural adaptations of E for digestion
(3)
3.2.5 State THREE functions of roughage (fibre) in the digestive system.
(3)
[11]
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3.3 The schematic representation below shows the relationship between two biological processes
in a plant cell. Study it and answer the questions that follow.
3.3.1 Identify the organelles X and Y.
(2)
3.3.2 Name the biological process that takes place in the following organelle:
(a) Organelle X
(b) Organelle Y
(1)
(1)
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The arrows 1 to 4 indicate the movement of gases into and out of the organelles
3.3.3 Name the gases represented by:
(a) 1
(b) 2
(c) 3
(d) 4
(1)
(1)
(1)
(1)
3.3.4 Name the pigment found in part labeled B.
(1)
3.3.5 State the function of the pigment named in QUESTION 3.3.4.
(1)
3.3.6 Explain the process that takes place in the part labelled A.
(4)
3.3.7 Describe the biological importance of the process that takes place in organelle Y. (3)
[17]
TOTAL QUESTION 4:
40
TOTAL SECTION B:
80
SECTION C
QUESTION 4
Describe the digestion, absorption and assimilation of food that contains only carbohydrates
NOTE: No marks will be awarded for answers in the form of flow charts or diagrams.
Facts: 17
Synthesis: 3
TOTAL QUESTION 4:
TOTAL SECTION C:
GRAND TOTAL
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20
20
150
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