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stage of photosynthesis that does not require light energy to occur.
a state in which the body has become dependent on a chemical substance in order to function.
a thin, flexible layer of the plant cell wall inside the middle lamella. It consists mainly of...
cellular respiration that takes place in the presence of free oxygen.
the blood circuit from the heart to the body and back to the heart.
a pore in nuclear membrane that enables macromolecules to enter and leave the nucleus.