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when an animal accumulates body fat or stores food resources during warmer periods and becomes dormant during winter.
the domain that contains prokaryotic micro-organisms. Some live in extreme environments, such as...
a large domain of prokaryotic micro-organisms. They are typically a few micrometres in length...
the main force responsible for the upwards movement of water in the xylem.
a hormone produced by the adrenal glands which helps to maintain the balance of sodium in the...
process whereby excess amino acids are broken down in the liver to form urea.