Definition and meaning of gram atom:

gram atom (g-at) - the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element; represents the mass in grams of Avogadro's number of atoms of the element

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of gamete:

gamete - a sex cell, e.g., a spermatozoan or egg cell, produced by sexually reproducing orgnaisms

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of gametocyte:

gametocyte - a reproductive cell capable of dividing by meiosis to produce gametes, e.g., a spermatocyte or oocyte

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of Geographic Information System:

GIS (Geographic Information System) - a system that allows automatic location of information suitable for mapping. Usually involves a software system that takes geographic position data and other data (e.g., type of bottom sediment) in order to create a map. Data on processes (e.g., current speed) can be incorporated to make a geographic model of flow

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of guanine:

guanine - one of the four nitogenous bases in DNA and RNA that make up the letters ATGC, guanine is the "G". The others are adenine, cytosine, and thymine. Guanine always pairs with cytosine

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of gulf:

gulf - a portion of an ocean or sea that extends into the land; a partially land-locked sea, e.g., the Gulf of Oman

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of gonopodium:

gonopodium - a term given to the anal fin (or the anterior portion of it) of a male fish when it is modified to function as a copulatory organ, e.g., in guppies

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of geotextile:

geotextile - a product used as a soil reinforcement agent and as a filter medium. It is made of synthetic fibers manufactured in a woven or loose nonwoven manner to form a blanket-like product, e.g., a silt curtain

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of germ layers:

germ layers - distinct layers of cells, produced during the early embryonic developmental process of gastrulation, which gives rise to all cells, tissues, organs, and organ systems of the organism's body. The three types of germ layers are the ectoderm, endoderm, and mesoderm. Diploblastic organisms (e.g. cnidarians) have two layers, ectoderm and endoderm; triploblastic organisms (all higher animal groups) have mesoderm between these two layers

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of G1:

G1 - phase in the cell cycle between the completion of cell division and the initiation of DNA synthesis

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of G2:

G2 - phase in the cell cycle between the completion of DNA synthesis and the next cell division

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of Ga:

Ga - symbol for one billion (109) years. The a stands for the Latin annus, year

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of Gaia theory:

Gaia theory - a model in which the organisms on the Earth have radically altered its composition. A stronger position is that the Earth's biosphere effectively acts as if it is a self-organizing system, which works in such a way as to keep its systems in some kind of equilibrium that is conducive to life

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of gale:

gale - a storm with wind speeds between 34 to 40 knots

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of galeiform:

galeiform - helmet-shaped

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of gall:

gall - an abnormal outgrowth caused by infection or irritation by certain fungi or bacteria

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of game species:

game species - species of animals that are hunted or fished, for purposes of sport, recreation, and food capture

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of gap dynamics:

gap dynamics - the formation and replacement of patches or gaps in a seascape or landscape, as in the destruction of corals and growth of new corals in that opening

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of gap formation:

gap formation - the creation of a habitat patch of different characteristics within a larger patch; the generation of patches in a seascape or landscape, such as the generation of openings in a coral reef as a result of storm damage or coral death

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of gap phases:

gap phases - the phases of the cell cycle known as G1 and G2, during which relatively less obvious cellular activity is visible

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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