Biology > IGCSE > Edexcel IGCSE Biology Revision Questions and Answer. (All)

Edexcel IGCSE Biology Revision Questions and Answer.

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Active Transport Correct Answer When a substance moves against/up a concentration gradient, from a region where they are of lower concentration to a region where they are of higher concentration. A... daption Correct Answer Any characteristic of an organism that improves its chances of surviving in its environment. Aerobic respiration Correct Answer Respiration with oxygen. Anaerobic respiration Correct Answer Respiration without oxygen. It releases less energy than aerobic respiration. Alleles Correct Answer Different forms of a gene which occupy the same relative positions on a pair of homologous chromosomes. Arteries Correct Answer Blood vessels which carry blood away from the heart. Anaesthetics Correct Answer Drugs that make the body unable to feel pain. Artificial selection Correct Answer A method used by humans to produce plants and animals with desired qualities. Natural selection Correct Answer When organisms better adapted to their environment tend to survive and produce more offspring. Asexual reproduction Correct Answer The process resulting in the production of genetically identical offspring from one parent, without the fusion of gametes. Assimilation Correct Answer The process whereby some of the absorbed food materials are converted into new protoplasm or used to provide energy. Breathing Correct Answer The process that brings about an exchange of gases between an organism and its environment. Ventilation Correct Answer The inhalation and exhalation of air. Respiration Correct Answer The inhalation and exhalation of air. Capillaries Correct Answer Microscopic thin-walled blood vessels which carry blood from a small artery (arteriole) to a small vein (venule). [Show More]

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