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
,CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
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
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
,CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
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
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
, CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
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
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
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
,CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
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
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
,CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
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
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
, CAMBRIDGE IGCSE BIOLOGY QUESTIONS AND ANSWERS
UPDATED 2024/2025 A COMPLETE EXAM SOLUTION ALL
ANSWERS 100% CORRECT DETAILED BEST GRADED A+ FOR
SUCCESS
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
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
