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sac-like organelles that contain hydrolytic enzymes.
a sensation of unease and discomfort in the upper stomach with an involuntary urge to vomit. A...
mostly columnar epithelium with cilia that line the nasal cavity, trachea, bronchi, fallopian...
the transfer of pollen from the anther to the stigma of the same plant (self-pollination) or of...
the movement of molecules across a membrane against the concentration gradient, from an area of...