Pearson Edexcel GCSE In Biology (1BI0) Paper 1H Mark Scheme questions and verified answers graded A+

Pearson Edexcel GCSE In Biology (1BI0) Paper 1H Mark Scheme questions and verified answers graded A+ acquired characteristic - correct answer-A characteristic that is changed by the environment. adaptation - correct answer-How organisms change in order to be more suited to their environment. addiction - correct answer-When someone is dependent on a drug and can't do without it. allele - correct answer-Alternative forms of the same gene. For each gene we have one allele from each parent in our cells. amphibians - correct answer-Vertebrates that have moist, permeable skin and lay jelly-coated eggs. Animalia - correct answer-One of the 5 kingdoms. They are multicellular and heterotrophic. Their cells have a nucleus. antibacterials - correct answer-Antibiotic that kills or slows the growth of bacteria. antibiotic - correct answer-Substance that can kill or slow the growth of microorganisms. Antibiotics are used to eliminate pathogens inside the body. antifungal - correct answer-Antibiotic that kills or slows the growth of fungi. antiseptic - correct answer-Chemical used eliminate pathogens. Antiseptics are used outside the body. autotrophic feeding - correct answer-To make food from small molecules using an energy source, such as light in photosynthesis. auxin - correct answer-Plant hormone that affects the growth and elongation of plant cells. axon - correct answer-The long extension of a neurone that carries an impulse away from the cell body towards other neurones. backbone - correct answer-A series of vertebrae extending from the skull to the pelvis. It supports the body. bacteria - correct answer-A type of microorganism. It consists of one cell that does not contain a nucleus. Some bacteria are pathogens (cause infection). bactericides - correct answer-Antibiotics that kill bacteria. binge drinking - correct answer-Consumption of large amounts of alcohol in a short period of time. binomial - correct answer-System of naming organisms using two Latin words. biomass - correct answer-The mass of an organism (or a population of organisms) when all of the water has been removed from their tissues. birds - correct answer-Vertebrates that have lungs, feathers and beaks, and lay hard-shelled eggs. blackspot - correct answer-Fungus that damages roses and is killed by sulphur dioxide in the air bloodworm - correct answer-Aquatic species that is an indicator of polluted water. BMI (body mass index) - correct answer-Estimate of how healthy a person's mass is for their height. brain - correct answer-An organ that coordinates the actions of your body. carbon cycle - correct answer-A sequence of processes by which carbon moves from the atmosphere, through living and dead organisms, into sediments and back to the atmosphere. carcinogen - correct answer-Something that causes cancer, such as tar in tobacco smoke. carnivore - correct answer-Animal that eats other animals. carrier - correct answer-A person whose cells have both a normal and a faulty allele. Symptomless carriers show no signs of the genetic disorder they are carrying. cell - correct answer-The basic 'unit of life', consisting of a nucleus and cytoplasm surrounded by a membrane. cell membrane - correct answer-Thin layer around a cell that controls what goes into and out of a cell. cell wall - correct answer-Outer stiff part of some cells that helps to support a cell. Plant cell walls are made out of cellulose. central nervous system (CNS) - correct answer-The brain and spinal cord. It processes and controls the transmission of electrical signals. characteristic - correct answer-A feature of an organism which can either be inherited or modified by the environment or both. For example, skin colour, number of petals, weight or blood group. chemical defences - correct answer-The body uses substances as a barrier against microorganisms or predators. chlorophyll - correct answer-Green substance found in chloroplasts (in plant cells). It is needed for photosynthesis. chloroplasts - correct answer-Green discs found in plant cells. Photosynthesis happens in them. Chordata (chordates) - correct answer-Animals with a supporting rod along the length of their body. chromosome - correct answer-A long thread of DNA. Each chromosome contains a series of genes along its length. cilia - correct answer-Tiny hair-like structures that move mucus out of the lungs and windpipe. cirrhosis - correct answer-Illness of the the liver caused by drinking big amounts of alcohol over a long period of time. classification - correct ans