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The only living tissue in plant xylem is
The only molecule in the living world that can replicate itself is
The only movable bone in the skull is
The only plant cells without nuclei among the following are:
The only reptiles that have specially adapted jaws to be able to swallow eggs or prey much larger in diameter than themselves are
The order of appearance of the main group of organisms during evolution can best be described as follows:
The organ which gets only oxygenated blood is
The organs of the circulatory system consist of
The outer membrane that covers the brain is
The outer skin most of the crustaceans are made up of a carbohydrate. This carbohydrate is