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an animal that eats plant material only.
a hormone produced by the adrenal glands which helps to maintain the balance of sodium in the...
the practice and science of classification. This is the part of systematics that is only...
the process of removing salt and other minerals from seawater, to make it drinkable.
two bean-shaped guard cells surrounding a pore in the epidermis of a leaf that allow gases to...
allergic reaction to certain allergens such as pollen. It causes sneezing, a runny nose and...