Edexcel IGCSE Biology Definitions || Already Passed.
Nutrition correct answers Provide living organisms with energy and raw material for growth and
repair.
Respire correct answers Living organisms release energy from their food.
Excretion correct answers The removal of waste products such as carbon dioxide and urine
carried out by the skin, the lungs and the kidneys.
Response correct answers Nerve coordination and reaction to stimuli.
Reproduction correct answers To produce offsprings for their species to survive.
Cells correct answers Tiny building blocks of living organisms.
Multicellular correct answers Organisms that contain a lot of cells and therefore need
organisation.
Organelles correct answers Tiny structures within cells.
Nucleus correct answers Contains genetic materials that control the cell's activities.
Cell membrane correct answers Outer surface of the cell and control movement of substances in
and out.
Cytoplasm correct answers Place of most chemical reactions and contain enzymes.
Chloroplasts correct answers Contain chlorophyll and carry out photosynthesis.
Cell wall correct answers Rigid structure made of cellulose that supports and strengthens cells.
Vacuole correct answers Large organelle that contains cell sap.
Cell sap correct answers A weak solution of sugars and salts.
Tissue correct answers A group of similar cells that work together to carry out particular
function.
Xylem tissue correct answers For transporting water and mineral salts in plants.
Phloem tissue correct answers For transporting sucrose and amino acids in plants.
Organ correct answers A group of different tissues that work together to perform a function.
Organ system correct answers A group of organs that does a particular job.
, Cereals correct answers Example: maize
Herbaceous legumes correct answers Example: beans and peas
Mycelium correct answers A structure of fungi.
Hyphae correct answers Thread like structure that make up mycelium.
Saprotrophic nutrition correct answers Fungi that secret extracellular enzymes into the area
outside their body to dissolve their food, so they can then absorb the nutrients.
Yeast correct answers A single-celled fungus.
Mucor correct answers Multicellular fungus and has a mycelium and hyphae.
Chlorella correct answers Protoctists, plant-cell-like
Amoeba correct answers Protoctists, animal-cell-like
Lactobacillus bulgaricus correct answers Bacteria, can be used to make milk go sour and turn
into yoghurt.
Pneumococcus correct answers Bacteria, spherical in shape, causes pneumonia.
Viruses correct answers Particles and smaller than bacteria
Parasites correct answers Organisms that depend on other organisms to live.
Tobacco mosaic virus correct answers Makes the leaves of tobacco plants discoloured by
stopping them from producing chloroplasts.
Pathogens correct answers Organisms that cause disease. (include fungi, protoctists, bacteria and
viruses)
Plasmodium correct answers Protoctists, causes malaria
Influenza virus correct answers Viruses, causes flu and HIV which causes AIDS.
Enzymes correct answers A substance that speeds up the speed of a reaction without being
changed or used up in the reaction. Made up of chains of amino acids.
Metabolic reactions correct answers Useful chemical reactions inside the body.
Substrate correct answers A molecules that is changed in the reaction.
Nutrition correct answers Provide living organisms with energy and raw material for growth and
repair.
Respire correct answers Living organisms release energy from their food.
Excretion correct answers The removal of waste products such as carbon dioxide and urine
carried out by the skin, the lungs and the kidneys.
Response correct answers Nerve coordination and reaction to stimuli.
Reproduction correct answers To produce offsprings for their species to survive.
Cells correct answers Tiny building blocks of living organisms.
Multicellular correct answers Organisms that contain a lot of cells and therefore need
organisation.
Organelles correct answers Tiny structures within cells.
Nucleus correct answers Contains genetic materials that control the cell's activities.
Cell membrane correct answers Outer surface of the cell and control movement of substances in
and out.
Cytoplasm correct answers Place of most chemical reactions and contain enzymes.
Chloroplasts correct answers Contain chlorophyll and carry out photosynthesis.
Cell wall correct answers Rigid structure made of cellulose that supports and strengthens cells.
Vacuole correct answers Large organelle that contains cell sap.
Cell sap correct answers A weak solution of sugars and salts.
Tissue correct answers A group of similar cells that work together to carry out particular
function.
Xylem tissue correct answers For transporting water and mineral salts in plants.
Phloem tissue correct answers For transporting sucrose and amino acids in plants.
Organ correct answers A group of different tissues that work together to perform a function.
Organ system correct answers A group of organs that does a particular job.
, Cereals correct answers Example: maize
Herbaceous legumes correct answers Example: beans and peas
Mycelium correct answers A structure of fungi.
Hyphae correct answers Thread like structure that make up mycelium.
Saprotrophic nutrition correct answers Fungi that secret extracellular enzymes into the area
outside their body to dissolve their food, so they can then absorb the nutrients.
Yeast correct answers A single-celled fungus.
Mucor correct answers Multicellular fungus and has a mycelium and hyphae.
Chlorella correct answers Protoctists, plant-cell-like
Amoeba correct answers Protoctists, animal-cell-like
Lactobacillus bulgaricus correct answers Bacteria, can be used to make milk go sour and turn
into yoghurt.
Pneumococcus correct answers Bacteria, spherical in shape, causes pneumonia.
Viruses correct answers Particles and smaller than bacteria
Parasites correct answers Organisms that depend on other organisms to live.
Tobacco mosaic virus correct answers Makes the leaves of tobacco plants discoloured by
stopping them from producing chloroplasts.
Pathogens correct answers Organisms that cause disease. (include fungi, protoctists, bacteria and
viruses)
Plasmodium correct answers Protoctists, causes malaria
Influenza virus correct answers Viruses, causes flu and HIV which causes AIDS.
Enzymes correct answers A substance that speeds up the speed of a reaction without being
changed or used up in the reaction. Made up of chains of amino acids.
Metabolic reactions correct answers Useful chemical reactions inside the body.
Substrate correct answers A molecules that is changed in the reaction.
