geotropism
reaction of organisms to gravity
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
geotropism Plants' response to gravity: roots grow downward, showing positive geotropism, while shoots grow upward in a negative response. PICTURE ...
geotropism The bending responses of a plant to the forces
germ layer. In the animal embryo, one of three basic layers (ectoderm, endoderm, mesoderm) from which the various organs and tissues arise in the multicellular animal.
Gravitropism [or geotropism] is a turning or growth movement by a plant or fungus in response to gravity. Charles Darwin was one of the first Europeans to document that roots show positive gravitropism and stems show negative gravitropism.
 See also: Tropism, Organ, Cells, Cell, Plant
  
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