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Glossary of terms used on this site

Glossary of biology.

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Glossaries

Term Main definition
genus
Glossaries - Biology glossary

division of family in the taxonomic classification system; the first part of the binomial scientific name

geographical variation
Glossaries - Biology glossary

differences in the phenotypic variation between populations that are separated geographically

geometric isomer
Glossaries - Biology glossary

isomer with similar bonding patterns differing in the placement of atoms alongside a double covalent bond

germ cells
Glossaries - Biology glossary

specialized cell line that produces gametes, such as eggs or sperm

germ layer
Glossaries - Biology glossary

collection of cells formed during embryogenesis that will give rise to future body tissues, more pronounced in vertebrate embryogenesis

gestation
Glossaries - Biology glossary

length of time for fetal development to birth

gibberellin (GA)
Glossaries - Biology glossary

plant hormone that stimulates shoot elongation, seed germination, and the maturation and dropping of fruit and flowers

gigantism
Glossaries - Biology glossary

condition caused by overproduction of GH in children

gill circulation
Glossaries - Biology glossary

circulatory system that is specific to animals with gills for gas exchange; the blood flows through the gills for oxygenation

ginkgophyte
Glossaries - Biology glossary

gymnosperm with one extant species, the Ginkgo biloba: a tree with fan-shaped leaves

gizzard
Glossaries - Biology glossary

muscular organ that grinds food

glabrous
Glossaries - Biology glossary

describes the non-hairy skin found on palms and fingers, soles of feet, and lips of humans and other primates

glia
Glossaries - Biology glossary

(also, glial cells) cells that provide support functions for neurons

gliding movement
Glossaries - Biology glossary

when relatively flat bone surfaces move past each other

global climate change
Glossaries - Biology glossary

altered global weather patterns, including a worldwide increase in temperature, due largely to rising levels of atmospheric carbon dioxide