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a sac-like structure in plant cells that contains the cell sap. It supports the cell and helps maintain its shape.
all the ecosystems on the Earth, all the species within these ecosystems and the genetic...
consists of the pectoral and pelvic girdles together with the arms and legs.
the sheet-like muscle found below the ribcage that plays a vital role in breathing.
fats that are solid at room temperature and are found in animals. They are thought to be linked...