Genotype
The genetic makeup of an organism.
Genus
A taxonomic category above the species level, designated by the first word of a species'
binomial Latin name.
Geographical range
The geographic area in which a population lives.
Geological time scale
A time scale established by geologists that reflects a consistent sequence of historical
periods, grouped into four eras: Precambrian, Paleozoic, Mesozoic, and Cenozoic.
Germ cells
Gametes or the cells that give rise to gametes.
Germarium
The egg-producing portion of an ovary and the sperm-producing portion of a testis in
Platyhelminthes and Rotifera.
Germination
In plants, the resumption of growth or the development from seed or spore.
Germplasm
A germplasm is a collection of genetic resources for an organism
Gibberellin
A class of related plant hormones that stimulate growth in the stem and leaves, trigger the
germination of seeds and breaking of bud dormancy, and stimulate fruit development with
auxin.
Gill
A localized extension of the body surface of many aquatic animals, specialized for gas
exchange.
Gland
A structure composed of modified epithelial cells specialized to produce one or more
secretions that are discharged to the outside of the gland.
Glandular
Relating to, affecting, or resembling a gland or its secretion.
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