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a small, circular opening in the exoskeleton of insects that allows air to enter the insect's body via the trachea.
a chemical used as an antiseptic to prevent bacterial and fungal growth.
the end part of the digestive system that consists of the caecum, colon, rectum and anus.
(also called vascular tissue) the tissues that transport water and dissolved food in a...
is the gradual increase in the average temperature of Earth's atmosphere and oceans.