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an allergic reaction that triggers the immune system causing constriction and inflammation of the respiratory tract resulting in wheezing and breathing difficulties.
external opening of the rectum (part of the mammalian digestive tract) through which faeces are...
a small, circular opening in the exoskeleton of insects that allows air to enter the insect's...
mass extinction event of 65 million years ago, in which about 85% of all species on Earth died...
when humans construct or alter the genome of an organism.
reactions in which large complex molecules are broken down to form smaller,simpler molecules;...