Examlex
Norepinephrine and acetylcholine both belong to a group of compounds called catecholamines.
Paedomorphosis
Retention of juvenile or larval features in a sexually mature animal.
Allometric Growth
Variation in the relative rates of growth for different parts of the body during development.
Macroevolution
Large-scale evolutionary events over long time spans. Macroevolution results in phenotypic changes in populations that are significant enough to warrant their placement in taxonomic groups at the species level and higher. Compare with microevolution.
Adaptive Radiation
The rapid diversification of a single ancestor species into a wide variety of forms with different ecological niches.
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