1
Life Sciences
Grade 11
June Exam_2025
Resources: @IMPAQ T1_JUN2023, 2022, 2021. WCED Revision booklet 2023 Term 1
& 2. IMAGES: CANVA
These information/answers are from the
memorandum (there are more possible answers).
Some information is repeated - I want to show you
the different ways in which the same information is
asked. I encourage you to answer the
calculation/illustration questions.
Good luck: Juffrou Ansie
CONTENT
1. BIODIVERSITY AND CLASSIFICATION OF MICROORGANISMS p. 5
2. BIODIVERSITY OF PLANTS p. 9
3. BIODIVERSITY OF ANIMALS p. 18
4. PHOTOSYNTHESIS p. 22
5. CELLULAR RESPIRATION p. 28
6. ANIMAL NUTRITION p. 30
7. HUMAN SYSTEMS p. 31
8. INVESTIGATIONS p. 34
@Juffrou_Ansie
, 2
Multiple-choice questions
Sporangia The structures in Rhizopus in which asexual spores are
developed and carried.
Type of reproductive process involving two parents and
Sexual gametes
Herbivores
• Feed on plant material
• Large volumes of food are ingested, as plant material has a low
energy value
• Incisors are sharp to cut off plant material
• Canines are usually absent
• Premolars and molars are large and flat to grind plant material
Carnivores
• Feed on animal material
• Ingest less food as the proteins and fats in meat have a much
higher energy value
• Incisors have sharp ends to bite off food
• Canines are large to catch, hold and tear meat
• Molars and premolars have profusions with sharp edges to cut
off food
Omnivores
o Feed on both plant and animal material
o Amount of food consumed depends on the energy value of the
food
o Similar teeth as carnivores but molars do not have such
prominent protrusions
Passive, naturally
acquired immunity Immunity transmitted from mother to foetus during pregnancy.
The terms ‘active’ and Active immunity: Your body is exposed to a pathogen and your
‘passive immunity’. body produces its own antibodies
Passive immunity: Your body does not produce its own
antibodies; you get an injection that contains antibodies
Antibodies can be Antibodies move from mother to baby through the placenta.
transferred from a The baby can receive antibodies through breast milk
mother to her baby.
Porifera The animal phylum which, at the cellular level of organisation,
is sessile and asymmetric.
@Juffrou_Ansie
, 3
Liver The organ responsible for deamination and production of bile.
Carbon dioxide, water Products of cellular respiration
and ATP
Krebs cycle The phase of respiration in which pyruvic acid is converted to
hydrogen atoms and carbon dioxide
The administration of a vaccine by injection/orally, to develop
Immunization immunity
The new DNA formed when a gene from the DNA of one
Recombinant DNA organism is extracted and inserted into the DNA of another
organism.
Crabs, spiders and grasshoppers belong to this phylum. This
Arthropoda animal phyla have segmented bodies and jointed legs
The type of fermentation that takes place in plants during
Alcoholic anaerobic respiration
The name of the kingdom under which protozoa, algae,
Protists plankton, and amoeba
Anaerobic respiration / Lack of oxygen that leads to the formation of lactic acid in
lactic acid muscle cells.
fermentation
Biotechnology The use of living organisms in industrial processes.
Oxidative The phase of respiration that takes place in the cristae of the
phosphorylation mitochondria.
Asexual Type of reproduction that occurs in fungi by means of spores.
Fungi has a body plan called a thallus.
Diploblastic The number of tissue layers of organisms with radial symmetry
TWO main types of Phagocytes
white blood Destroy pathogens by absorbing them before they can harm
the body
Lymphocytes
Produce antibodies that destroy pathogens.
Pathogens Common name for organisms that cause diseases.
@Juffrou_Ansie
, 4
Phagocytosis Process by which phagocytes engulf pathogens
Triploblastic Insects are triploblastic
What is represented by a phylogenetic tree? The evolutionary
history of organisms.
Rhizome Underground stem that grows more or less horizontally, as in
many types of ferns.
Diploblastic A body wall that consists of two layers of cells, namely an
ectoderm and an endoderm.
Cephalization Formation of a head with concentrated nerve tissue and
receptors
Hydrostatic The type of skeleton found in the Hydra.
Haemocoel A body cavity filled with blood.
Glucagon The hormone that increases blood glucose levels.
Insulin The hormone that lowers blood glucose levels.
Diabetes An illness that develops when the pancreas produces an
insufficient amount of insulin
Type 1 diabetes Little or no insulin is produced, and the person needs daily
insulin injections
Type 2 diabetes The pancreas produces insulin, but the body cells cannot use it
effectively. The person needs oral medication or insulin.
Hyperglycaemia When insulin is absent or not functioning effectively, most of
the glucose remains in the human body and this causes an
increased blood glucose level, called hyperglycaemia
A round ball of chewed food mixed with saliva in the oral cavity,
(Food) bolus which is pushed towards the oesophagus during the
swallowing process
Egestion The process during which undigested residues, in the form of
faeces, are disposed of
Common feature of • Viruses are absolute parasites.
viruses • A virus possesses DNA or RNA.
• A virus cannot multiply by division
@Juffrou_Ansie
Life Sciences
Grade 11
June Exam_2025
Resources: @IMPAQ T1_JUN2023, 2022, 2021. WCED Revision booklet 2023 Term 1
& 2. IMAGES: CANVA
These information/answers are from the
memorandum (there are more possible answers).
Some information is repeated - I want to show you
the different ways in which the same information is
asked. I encourage you to answer the
calculation/illustration questions.
Good luck: Juffrou Ansie
CONTENT
1. BIODIVERSITY AND CLASSIFICATION OF MICROORGANISMS p. 5
2. BIODIVERSITY OF PLANTS p. 9
3. BIODIVERSITY OF ANIMALS p. 18
4. PHOTOSYNTHESIS p. 22
5. CELLULAR RESPIRATION p. 28
6. ANIMAL NUTRITION p. 30
7. HUMAN SYSTEMS p. 31
8. INVESTIGATIONS p. 34
@Juffrou_Ansie
, 2
Multiple-choice questions
Sporangia The structures in Rhizopus in which asexual spores are
developed and carried.
Type of reproductive process involving two parents and
Sexual gametes
Herbivores
• Feed on plant material
• Large volumes of food are ingested, as plant material has a low
energy value
• Incisors are sharp to cut off plant material
• Canines are usually absent
• Premolars and molars are large and flat to grind plant material
Carnivores
• Feed on animal material
• Ingest less food as the proteins and fats in meat have a much
higher energy value
• Incisors have sharp ends to bite off food
• Canines are large to catch, hold and tear meat
• Molars and premolars have profusions with sharp edges to cut
off food
Omnivores
o Feed on both plant and animal material
o Amount of food consumed depends on the energy value of the
food
o Similar teeth as carnivores but molars do not have such
prominent protrusions
Passive, naturally
acquired immunity Immunity transmitted from mother to foetus during pregnancy.
The terms ‘active’ and Active immunity: Your body is exposed to a pathogen and your
‘passive immunity’. body produces its own antibodies
Passive immunity: Your body does not produce its own
antibodies; you get an injection that contains antibodies
Antibodies can be Antibodies move from mother to baby through the placenta.
transferred from a The baby can receive antibodies through breast milk
mother to her baby.
Porifera The animal phylum which, at the cellular level of organisation,
is sessile and asymmetric.
@Juffrou_Ansie
, 3
Liver The organ responsible for deamination and production of bile.
Carbon dioxide, water Products of cellular respiration
and ATP
Krebs cycle The phase of respiration in which pyruvic acid is converted to
hydrogen atoms and carbon dioxide
The administration of a vaccine by injection/orally, to develop
Immunization immunity
The new DNA formed when a gene from the DNA of one
Recombinant DNA organism is extracted and inserted into the DNA of another
organism.
Crabs, spiders and grasshoppers belong to this phylum. This
Arthropoda animal phyla have segmented bodies and jointed legs
The type of fermentation that takes place in plants during
Alcoholic anaerobic respiration
The name of the kingdom under which protozoa, algae,
Protists plankton, and amoeba
Anaerobic respiration / Lack of oxygen that leads to the formation of lactic acid in
lactic acid muscle cells.
fermentation
Biotechnology The use of living organisms in industrial processes.
Oxidative The phase of respiration that takes place in the cristae of the
phosphorylation mitochondria.
Asexual Type of reproduction that occurs in fungi by means of spores.
Fungi has a body plan called a thallus.
Diploblastic The number of tissue layers of organisms with radial symmetry
TWO main types of Phagocytes
white blood Destroy pathogens by absorbing them before they can harm
the body
Lymphocytes
Produce antibodies that destroy pathogens.
Pathogens Common name for organisms that cause diseases.
@Juffrou_Ansie
, 4
Phagocytosis Process by which phagocytes engulf pathogens
Triploblastic Insects are triploblastic
What is represented by a phylogenetic tree? The evolutionary
history of organisms.
Rhizome Underground stem that grows more or less horizontally, as in
many types of ferns.
Diploblastic A body wall that consists of two layers of cells, namely an
ectoderm and an endoderm.
Cephalization Formation of a head with concentrated nerve tissue and
receptors
Hydrostatic The type of skeleton found in the Hydra.
Haemocoel A body cavity filled with blood.
Glucagon The hormone that increases blood glucose levels.
Insulin The hormone that lowers blood glucose levels.
Diabetes An illness that develops when the pancreas produces an
insufficient amount of insulin
Type 1 diabetes Little or no insulin is produced, and the person needs daily
insulin injections
Type 2 diabetes The pancreas produces insulin, but the body cells cannot use it
effectively. The person needs oral medication or insulin.
Hyperglycaemia When insulin is absent or not functioning effectively, most of
the glucose remains in the human body and this causes an
increased blood glucose level, called hyperglycaemia
A round ball of chewed food mixed with saliva in the oral cavity,
(Food) bolus which is pushed towards the oesophagus during the
swallowing process
Egestion The process during which undigested residues, in the form of
faeces, are disposed of
Common feature of • Viruses are absolute parasites.
viruses • A virus possesses DNA or RNA.
• A virus cannot multiply by division
@Juffrou_Ansie
