IGCSE Biology Revision
Answers
Test 2 Classification of Living
Organisms
5.
The animal is a thin
annelid
cylinder in shape with
rings around its body
showing that it is
segmented.
The animal is a thin
reptile
cylinder in shape with a
dry scaly skin.
The animal is a thin
nematode
cylinder in shape and
has a moist, slimy skin.
6. Dicotyledons
7. Mammals; myriapods; molluscs
8.
The skin is moist and
amphibian
they have legs.
The skin is covered in
mammals
fur and they have
legs.
The skin is covered in
fish
scales and they have
fins.
The skin is covered in
birds
feathers and they
have legs.
The skin is covered in
reptiles
scales and they have
legs.
9. Mammals
10. (a) and (d)
______________________________
1.
2.
3.
4.
Test 3 Classification of Living
Organisms
Test 1 Characteristics of
Living Organisms
1. (b), (c) and (e)
2. Nutrition; respiration
3. (b) and (d)
4. T, F, F, F
5. Nutrition; respiration
6. Metabolism; excretion
7. F, T, F, F
8. Movement
9.
The supply of petrol
nutrition
for the car is similar to
The release of energy
respiration
when petrol is burnt in
a car is like
The release of energy
movement
from petrol in a car
makes the wheels go
round. In a living
organism this is like
A car releases exhaust excretion
fumes. In a living
organism this is like
10. (b) and (d)
_____________________________
Y and Z; genus
F, F, T, F
(b) and (d)
Arachnids
1.
2.
3.
4.
5.
6.
7.
8.
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(c) and (e)
Vertebrates
2
T, T, F, F
(a), (c) and (d)
Arthropods
Arthropods
(a) and (c)
9. Rana ibericus
10.
Birds
Legs covered in
scales and body
covered in feathers.
Amphibians
Body covered in
moist skin.
Reptiles
Body covered in dry
scales.
Mammals
Body covered in hair
or fur.
______________________________
Test 4 Cell Structure and
Function
1. T, F, T, T, F, F
2. A cell membrane
3. F, F, F, T
4. (c)
5. A large surface area
6.
root hair
cell
leaf
organ
xylem
tissue
7. Trachea or oviducts
8. (a)
9. T, T, F, F
10.
nucleus
controls cell activities
cell wall
gives the plant cell
shape
chloroplast
produces food
cell
controls what enters
membrane
and leaves the cell
______________________
Test 5 Cell Structure and
Function
1.
2.
3.
4.
5.
6.
7.
Cell wall
Chloroplast
(a)
F, F, T, T
(b) and (d)
T, F, F, T, F, T
Contraction
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8. Cell wall
9. Fungi
_____________________________
Test 6 Movement in and out
of Cells
1. (c)
2. T, T, F, F
3. Diffusion
4. (a)
5. (a)
6. T, F, F, F
7. Down
8.
Solute
when salt dissolves in
water, this is the salt
Solution when salt dissolves in
water, this is the
product
Solvent when salt dissolves in
water, this is the water
9. T, T, F, F, T
10. Does not need energy
_____________________________
Test 7 Cells
1. (c)
2. T, F, F, T
3. Energy; against
4. T, F, T, F
5. (a) and (c)
6. Down; lost; to; 6%
7. (a)
8. T, F, T, F, F
9. Water; high; low; down
10. F, T, T, T, F
_______________________
Test 8 Enzymes
1. (b)
2. 2
3. (c)
4. (a) and (b)
5. F, T, F, F, T
6. F, F, T, T
7. (c)
8. F, F, T, T
_____________________________
Test 9 Nutrients and Plant
Nutrition
1. Amino acids
2. Protein
3. (c)
4. Nitrogen
5. Less carbon dioxide; more oxygen
6. (c)
7. F, F, F, T
8. (b)
9. Mineral ions; chlorophyll
10. F, F, F, T
_____________________________
Test 11 Nutrients and Plant
Nutrition
1. Bacteria; lactic acid
2. (a)
3. (d)
4. A wood burner
5. F, T, F, T, F, F
6.
Photosynthesis
manufactures small
carbohydrate molecules.
Some of the molecules
made in photosynthesis
are converted to amino
acids.
Some molecules made
in photosynthesis are
converted to starch
grains.
These are
called
glucose.
These are
used for
protein
synthesis.
These are
used for
storage.
7. Magnesium
8. F, T, F
9. (d)
10. F, F, T, F
_______________________
Test 12 Animal Nutrition
Test 10 Nutrients and Plant
Nutrition
1. Water; oxygen
2. (c)
3. T, F, F, T
4. (d)
5. Stoma
6. (b)
7. Glucose; chlorophyll; chloroplast
8. Amino acids/proteins
9. (d)
10.
Fat
C
Carbohydrate
B
Protein
A
_____________________________
1. (b), (d) and (e)
2. Duodenum
3. Peristalsis
4.
Fats
Fatty acids and
glycerol
Proteins
Amino acids
Carbohydrates Simple sugars
5. Liver
6.
Incisor
biting and cutting
Canine
piercing and tearing
Molars
grinding and chewing
7. F, F, F, T
8. (b) and (d)
9. Pancreas
10. (a) and (b)
_______________________
© Hodder Education 2009
Test 13 Animal Nutrition
1.
Produces digestive
pancreas
juice
Transports food
oesophagus
from mouth to
stomach
Absorbs digested
small
food
intestine
Produces
stomach
hydrochloric acid
2. Mouth; stomach
3. (a) and (b)
4. F, T, T, F, T
5. (c)
6. Stomach
7. Amylase
8. (a)
9. (b), (c) and (e)
10. Constipation
_____________________________
Test 14 Transport in Plants
1. Xylem vessels; mesophyll cells
2. (d)
3. F, F, F, T
4. Phloem; translocation
5. (b)
6. T, F, T, F
7. Root
8. F, T, F, T
_____________________________
Test 15 Transport in Humans
1.
2.
3.
4.
5.
6.
Right ventricle
T, F, F
(a)
X and Z
(b)
(a)
7.
Plasma
Platelets
carrying food
substances
clotting
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Red blood cells carrying oxygen
White blood
defence against
cells
disease
8. (b)
9. Is fitter
10. Towards the heart
_____________________________
Test 16 Transport in Humans
1. (a), (b) and (d)
2. Pulmonary artery; aorta
3. F, T, F, T, F
4. (b) and (d)
5. F, T, F, F
6.
A vein
B artery
C capillaries
7. (b)
8. Left ventricle
9. Carrying oxygen
10. Arteries; capillaries; veins
______________________________
Test 17 Respiration
1. (b), (d) and (e)
2. Tar
3. Lactic acid
4.
Carbon
stops blood cells
monoxide
carrying oxygen
Nicotine
raises blood
pressure
Tar
causes lung
cancer
5. T, T, F
6. To make the dough rise
7. (d)
8. Water
9. (a) and (b)
10. C
______________________________
Test 18 Respiration
1. (b) and (c)
2. Lactic acid
3. Ferment; alcohol
4. (c)
5. F, F, F, T
6. Increases; increases
7. A smaller surface area
8. (c)
9. F, T, F, F
10. (a)
______________________________
Test 19 Transport and
Respiration
1. (a)
2.
1 Exposure to damaged tissue
2 Platelets activated
3 Fibrinogen converted to fibrin
4 Red blood cells trapped
3. An infection
4. F, T, T, F
5. (b)
6. Lymphocytes; antibodies
7. (c)
8. Lymph vessels
9. Contract; relax; up and out;
increases
10. F, T, F
_____________________________
Test 20 Excretion
1. F, T, F, F
2. Excess protein
3. Urine
4. (a), (c) and (d)
5. Urine
6. (b)
7. B
8. (a), (b) and (d)
_____________________________
© Hodder Education 2009
Test 21 Gas Exchange and
Excretion
1.
1
External intercostal muscles
contract
2 Ribs are raised
3 Volume of the chest increases
4 Pressure inside the chest falls
5 Air enters
2. F, T, F, F
3. Proteins
4. (b)
5. T, F, F, F
6. (b)
7. F, T, F
8. (b)
______________________________
Test 22 Co-ordination and
Response
1. (c)
2. F, T, F, F
3. Synapse
4. Plants; gravity; growth
5. (a)
6.
1 Sense organ
2 Sensory neurone
3 Central nervous system
4 Motor neurone
5 Effector
7. Retina
8. Sensory neurone; motor neurone
9. A receptor; a relay; an effector
10. (a)
______________________________
Test 23 Co-ordination and
Response
1. Adrenaline
2. (c)
3.
1 receptor
2 sensory neurone
3 relay neurone
4 motor neurone
5 effector
4. Thicker; less
5. F, T, T
6. Circular; radial
7. Motor neurone
8. (d)
9. Triceps
10. (b) and (d)
______________________________
Test 24 Co-ordination and
Response
1. Homeostasis
2. Evaporation; cooled
3. F, F, F, T
4. (b) and (c)
5. (c)
6. T, T, T, T
7. (c)
8. F, F, T, F
______________________________
Test 25 Co-ordination and
Response
1. T, F, F, F
2. (a) and (b)
3. Retina; black-and-white; dim
4. (c)
5. (a)
6. Glycogen; insulin; sugar
7. T, F, T, F, F
8. Glucagon
9. (c) and (d)
10. F, F, F, T
______________________________
Test 26 Reproduction
1. (a), (c) and (d)
2. T, F, F, F
3. Anther
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4. (c) and (d)
5. Contracts; dilates; dilates
6. B and C; A and D; C
7. F, F, T, F
8. Pollination; pollen grain;
fertilisation
9. (c)
10. F, F, T, T
______________________________
Test 27 Reproduction
1. (b)
2. T, T, F, F
3. Testes
4. (a)
5. Anther; filament
6. F, T, F
7. C; E; B
8. (c)
9. Southwest
10.
Ovary
forms a fruit
Petal
drops off
Ovule
becomes a seed
Sepal
remains in position, protects
the developing fruit
Stamen dries up and falls off
Test 28 Reproduction –
Revision mode
1. F, F, T, F
2. (a)
3. Amnion
4. Sperms; vagina
5. T, T, T, F
6. (a)
7. Oviduct; vagina; ovary
8. (b)
9. Menopause
10. (c)
______________________________
Test 29 Reproduction
1. F, F, T, F
2. Decreases; very low levels
3. Testes
4. (b) and (d)
5. F, F, T, F
6. A vasectomy
7. (a)
8. Puberty
9. T, F, T, T
10. (d)
______________________________
2
3
Food reserves are digested
Digested food moves to growing
points
4 The radicle grows out of the seed
5 The plumule grows out of the
seed
6. Main root; shoot; food reserve
7. (c) and (d)
8. 100oC; in an oven or incubator;
water
______________________________
Test 33 Inheritance
Test 30 Reproduction
1. F, F, T, T
2. (a) and (d)
3. T, T, F, F
4. Bacterial; can be treated
5. (a), (c) and (d)
6. F, F, T, T
7. Cutting; oviducts
8. T, F, F, F
______________________________
1. Sex; X; X; X; Y
2. (c)
3. F, F, T, F
4. (c)
5. Mitosis; diploid
6. (b), (c) and (e)
7. F, T, F, F, F
8. Diploid; haploid; more
9. (d)
10. 22+Y; 23+Y
______________________________
Test 31 Reproduction
Test 34 Inheritance
1. (a) and (d)
2. Ovaries
3. F, T, F, F
4. Mammary
5. (a), (b), (c), (e) and (f)
6. Artificial insemination
7. F, F, F, F, T
8. (a)
______________________________
1. (a) and (c)
2. Haploid; diploid; neither; diploid
3. F, F, F, T
4. (c)
5. M; 0.5M; M
6. (d)
7. An X chromosome
______________________________
Test 32 Growth and
Development
Test 35 Inheritance
1. F, F, F, T
2. (b)
3. Germination; decreases
4. Water
5.
1 Enzymes in the seed become
active
© Hodder Education 2009
1.
2.
3.
4.
5.
6.
7.
BB and Bb
F, T, F, F
(b), (c) and (d)
Harmful; increased
Aidan
(d)
1:2:1; 3:1
8. 3:1
9. (a) and (c)
10. (b)
_______________________
Test 36 Inheritance
1. 47
2. T, F, F, T, T, T
3. (a)
4. 25%
5. T, F, F, F, T
6. 50%
7. (b) and (e)
8. T, F, F, T
9. (e)
10. 200 red and 200 white
______________________________
Test 37 Inheritance
1. (b)
2. F, F, F, T
3. An antibiotic; resistant; survive
4. Co-dominance
5. (c)
6. (c)
7. A white forelock; dominant
______________________________
Test 38 Relationships
1. (a)
2. T, T, F, T
3. C
4. (d)
5. Producers
6. (d)
7. F, T, F, F
8. Energy flow
9. Exponential phase
10. C
______________________________
© Hodder Education 2009
Test 39 Relationships
1. (a) and (c)
2. F, F, F, T
3. Photosynthesis
4. Reproduction; death
5. (b) and (d)
6. Carnivore
7. Light; chemical
8. (b) and (c)
9. T, T, F, T
10. Decomposers
______________________________
Test 40 Relationships
1. F, F, F, T
2. (a)
3. Cause mutations
4. Carbon monoxide
5. F, T, F, F
6. (a) and (c)
7. Nitrates; dissolved oxygen
8. T, F, F, F, T
9. (a)
10. Decreases; light; suspended
solids
______________________________
Test 41 Relationships
1.
2.
3.
4.
5.
6.
7.
8.
9.
F, F, T, F
(c)
Increase; oxygen
(a)
F, T, F, F
(c)
D
(b)
F, F, T, F
10.
1 Screening to remove plastics and
rubber for recycling
2 Sedimentation to allow solids to
collect
3 Sludge digestion to kill parasite
eggs and break down organic
matter
4 Liquid filtration to remove
particles in suspension
Test 42 Relationships
1. (a), (d) and (f)
2. T, F, T, T, F, F
3. Plastic
4. T, T, F, F
5. (a), (d) and (e)
6. Not biodegradable
7. (c)
8. T, F, T, T, F
___________________________
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