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the cavity used for transport purposes. It has one opening to the environment through which ingestion and digestion both take place.
an infectious disease that is widespread in tropical and subtropical parts of the world and is...
cellular respiration that takes place in the presence of free oxygen.
organelles that only occur in the green parts of plants. They contain the green pigment...
is the passing of traits to the offspring from its parents or ancestors. The study of heredity...
the main blood vessel that returns deoxygenated blood from the head and thorax to the right...