Gould, Stephen Jay
A professor of geology and zoology at Harvard University since 1967. A paleontologist and an evolutionary biologist, he teaches geology and the history of science, as well. With others, he has advanced the concept that major evolutionary changes can occur in sudden bursts rather than through the slow, gradual process proposed by the traditional view of evolution. In addition to his scholarly works, Gould has published numerous popular books on paleoanthropology, Darwinian theory, and evolutionary biology.

Grant, Peter and Rosemary                          
Biologists whose long-term research focuses on finches in the Galapagos Islands, and the evolutionary impact of climatic and environmental changes on their populations. They live part of the year in the Islands, and have received honors for their work since they began in 1973.

Group selection
The selection operating between groups of individuals than between individuals. It would produce attributes beneficial to a group in competition with other groups than attributes beneficial to individuals.

GTP
An energy-rich molecule analogous to A TP that is required the synthesis of all peptide bonds during translation.

Guanine (G)
A nitrogenous base, one member of the base pair GC (guanine and cytosine) in DNA.

Gyandromorph
Organisms that have both male and female cells and the express both male and female characteristics.