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Term Definition
meiosis

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

meristem

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

mineral nutrient

an inorganic substance necessary for normal growth

mutant

a genetic variant

neck canal cells

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

pH

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

phenotype

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

pheromone

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

phloem

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

pigment

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

polyploid

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

pteridophyte

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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