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Term Definition

a process of cell division in sexually reproducing organisms that results in reduction of chromosome number (usually


area of active cell division that gives rise to other cells and tissues

mineral nutrient

an inorganic substance necessary for normal growth


a genetic variant

neck canal cells

a row of cells present in the neck of an unopened archegonium


a measurement of the acidity or relative concentration of hydrogen ions in a solution ( pH = -log [H+]). A neutral solution is pH 7; an acidic solution less than 7 and a alkaline or basic solution greater than 7


the appearance of an organism that results from the interaction of its genotype and the environment


a substance produced by one individual of a species that affects the development of other individuals in a population


the food conducting tissue of a vascular plant

photosynthesis (-tic)

a biochemical process in green plants by which (typically) carbohydrates are synthesized from carbon dioxide and water using light as an energy source and releasing oxygen as a byproduct


any of a number of organic molecules that absorb and reflect light of particular wave lengths


having more than double the basic chromosome number

prothallus (also prothallium)

a structure produced from a developing spore that bears sex organs; sometimes used interchangeably with gametophyte


a term commonly referring to ferns and fern allies such as horsetails and clubmosses

qualitative data

data expressed as a description of an inherent or distinguishing characteristic, property or trait

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