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a relationship between two different organisms, of different species, from which at least one of...
the site where a nerve impulse is transmitted from one neuron to the next. There is no physical...
a multi nucleate (many nuclei) cell resulting from cell fusions of uninuclear cells.
the most common and most movable type of joint in the body of a mammal e.g. the elbow.
the formation of a relatively complex chemical compound from simpler substances.
the field of study that provides scientific names for organisms, describes them, preserves...
the blood circuit from the heart to the body and back to the heart.
a black substance that coats the lungs of a smoker, causing cancer of the respiratory tract.
a group or category in the biological classification system (the plural of taxon is taxa).