CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition - CORRECT
ANSWERS Mrs. Gren
Movement - CORRECT ANSWERS An action by an organism or part of an organism
causing a change of position or place
Respiration - CORRECT ANSWERS The chemical reactions in cells that break down
nutrient molecules and release energy for metabolism
Sensitivity - CORRECT ANSWERS The ability to defect or sense stimuli in the internal or
external environment and to make appropriate responses
Growth - CORRECT ANSWERS A permanent increase in size and dry mass by an increase
in cell number or cell size or both
Excretion - CORRECT ANSWERS Removal from organisms of the waste products of
metabolism (chemical reactions in cells including respiration), toxic materials and substances in
excess of requirements
Nutrition - CORRECT ANSWERS Taking in of materials for energy, growth and
development; plants require light, carbon dioxide, water and ions; animals need organic
compounds and ions and usually need water
Common ancestor - CORRECT ANSWERS A species that lived long ago that is thought to
be a distant ancestor of two or more species living today
Organism - CORRECT ANSWERS A living thing
,CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
Morphology - CORRECT ANSWERS The overall form and shape of organisms' bodies, such
as whether they had legs or wings
Anatomy - CORRECT ANSWERS The detailed body structure of an organism
Kingdom, Phylum, Class, Order, Family, Genus, Species - CORRECT ANSWERS The
classification system
The binomial naming system - CORRECT ANSWERS An internationally agreed system in
which the scientific name of an organism is made up of two parts showing the genus and
species created by Linnaeus
Animals, Plants, Fungi, Protoctista, Prokaryotes, (Viruses) - CORRECT ANSWERS The
kingdoms of living organisms
Animals - CORRECT ANSWERS Multicellular (their bodies contain many cells); cells have a
nucleus, but no cell walls or chloroplasts; feed on organic substances made by other living
organisms
Plants - CORRECT ANSWERS Multicellular; cells have a nucleus, cell walls made of
cellulose and often contain chloroplasts; feed by photosynthesis; may have roots, stems and
leaves
Fungi - CORRECT ANSWERS Usually multicellular; have nuclei; have cell walls, not made
of cellulose; do not have chlorophyll; feed by saprophytic or parasitic nutrition
,CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
Protoctista - CORRECT ANSWERS Multicellular or unicellular; cells have a nucleus; cells
may or may not have a cell wall and chloroplasts; some feed by photosynthesis and others feed
on organic substances made by other organisms
Prokaryotes - CORRECT ANSWERS Often unicellular (single-celled); have no nucleus; have
cell walls, not made of cellulose; have no mitochondria
Viruses - CORRECT ANSWERS Not considered a living thing because they cannot move,
show sensitivity, grow, reproduce, excrete or feed
Phylum Vertebrates, Phylum Invertebrates - CORRECT ANSWERS Animal classification -
Phylums
Phylum Vertebrates - CORRECT ANSWERS Have backbones; Class Fish; Class Amphibians;
Class Reptiles; Class Birds; Class Mammals
Several pairs of jointed legs; exoskeleton; insects; crustacean; arachnids; myriapods -
CORRECT ANSWERS Phylum Invertebrates
Class Fish - CORRECT ANSWERS Vertebrates with scaly skin; have gills; have fins
Class Amphibians - CORRECT ANSWERS Vertebrates with moist, scale-less skin; eggs laid
in water, larva (tadpole) lives in water; adult often lives on land; larva has gills; adult has lungs
Class Reptiles - CORRECT ANSWERS Vertebrates with scaly skin; lay eggs with rubbery
shells
, CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
Class Birds - CORRECT ANSWERS Vertebrates with feathers; forelimbs have become
wings; lay eggs with hard shells; endothermic; have a beak; heart has four chambers
Class Mammals - CORRECT ANSWERS Vertebrates with hair; have a placenta; young feed
on milk from mammary glands; endothermic; have a diaphragm; heart has four chambers; have
different types of teeth (incisors; canines; premolars and molars)
Insects - CORRECT ANSWERS Arthropods with three pairs of jointed legs; two pairs of
wings (one or both may be vestigial); breathe through trachea; body divided into head, thorax
and abdomen
Crustaceans - CORRECT ANSWERS Arthropods with more than four pairs of jointed legs;
not millipedes or centipedes; breathe through gills
Arachnids - CORRECT ANSWERS Arthropods with four pairs of jointed legs; breathe
through gills called book lungs
Myriapods - CORRECT ANSWERS Body consists of many segments; each segment has
jointed legs
Ferns and flowering plants - CORRECT ANSWERS Plant classification
Ferns - CORRECT ANSWERS Plants with roots, stems and leaves; have leaves called
fronds; do not produce flowers; reproduce by spores
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition - CORRECT
ANSWERS Mrs. Gren
Movement - CORRECT ANSWERS An action by an organism or part of an organism
causing a change of position or place
Respiration - CORRECT ANSWERS The chemical reactions in cells that break down
nutrient molecules and release energy for metabolism
Sensitivity - CORRECT ANSWERS The ability to defect or sense stimuli in the internal or
external environment and to make appropriate responses
Growth - CORRECT ANSWERS A permanent increase in size and dry mass by an increase
in cell number or cell size or both
Excretion - CORRECT ANSWERS Removal from organisms of the waste products of
metabolism (chemical reactions in cells including respiration), toxic materials and substances in
excess of requirements
Nutrition - CORRECT ANSWERS Taking in of materials for energy, growth and
development; plants require light, carbon dioxide, water and ions; animals need organic
compounds and ions and usually need water
Common ancestor - CORRECT ANSWERS A species that lived long ago that is thought to
be a distant ancestor of two or more species living today
Organism - CORRECT ANSWERS A living thing
,CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
Morphology - CORRECT ANSWERS The overall form and shape of organisms' bodies, such
as whether they had legs or wings
Anatomy - CORRECT ANSWERS The detailed body structure of an organism
Kingdom, Phylum, Class, Order, Family, Genus, Species - CORRECT ANSWERS The
classification system
The binomial naming system - CORRECT ANSWERS An internationally agreed system in
which the scientific name of an organism is made up of two parts showing the genus and
species created by Linnaeus
Animals, Plants, Fungi, Protoctista, Prokaryotes, (Viruses) - CORRECT ANSWERS The
kingdoms of living organisms
Animals - CORRECT ANSWERS Multicellular (their bodies contain many cells); cells have a
nucleus, but no cell walls or chloroplasts; feed on organic substances made by other living
organisms
Plants - CORRECT ANSWERS Multicellular; cells have a nucleus, cell walls made of
cellulose and often contain chloroplasts; feed by photosynthesis; may have roots, stems and
leaves
Fungi - CORRECT ANSWERS Usually multicellular; have nuclei; have cell walls, not made
of cellulose; do not have chlorophyll; feed by saprophytic or parasitic nutrition
,CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
Protoctista - CORRECT ANSWERS Multicellular or unicellular; cells have a nucleus; cells
may or may not have a cell wall and chloroplasts; some feed by photosynthesis and others feed
on organic substances made by other organisms
Prokaryotes - CORRECT ANSWERS Often unicellular (single-celled); have no nucleus; have
cell walls, not made of cellulose; have no mitochondria
Viruses - CORRECT ANSWERS Not considered a living thing because they cannot move,
show sensitivity, grow, reproduce, excrete or feed
Phylum Vertebrates, Phylum Invertebrates - CORRECT ANSWERS Animal classification -
Phylums
Phylum Vertebrates - CORRECT ANSWERS Have backbones; Class Fish; Class Amphibians;
Class Reptiles; Class Birds; Class Mammals
Several pairs of jointed legs; exoskeleton; insects; crustacean; arachnids; myriapods -
CORRECT ANSWERS Phylum Invertebrates
Class Fish - CORRECT ANSWERS Vertebrates with scaly skin; have gills; have fins
Class Amphibians - CORRECT ANSWERS Vertebrates with moist, scale-less skin; eggs laid
in water, larva (tadpole) lives in water; adult often lives on land; larva has gills; adult has lungs
Class Reptiles - CORRECT ANSWERS Vertebrates with scaly skin; lay eggs with rubbery
shells
, CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
Class Birds - CORRECT ANSWERS Vertebrates with feathers; forelimbs have become
wings; lay eggs with hard shells; endothermic; have a beak; heart has four chambers
Class Mammals - CORRECT ANSWERS Vertebrates with hair; have a placenta; young feed
on milk from mammary glands; endothermic; have a diaphragm; heart has four chambers; have
different types of teeth (incisors; canines; premolars and molars)
Insects - CORRECT ANSWERS Arthropods with three pairs of jointed legs; two pairs of
wings (one or both may be vestigial); breathe through trachea; body divided into head, thorax
and abdomen
Crustaceans - CORRECT ANSWERS Arthropods with more than four pairs of jointed legs;
not millipedes or centipedes; breathe through gills
Arachnids - CORRECT ANSWERS Arthropods with four pairs of jointed legs; breathe
through gills called book lungs
Myriapods - CORRECT ANSWERS Body consists of many segments; each segment has
jointed legs
Ferns and flowering plants - CORRECT ANSWERS Plant classification
Ferns - CORRECT ANSWERS Plants with roots, stems and leaves; have leaves called
fronds; do not produce flowers; reproduce by spores
