Dictionary > Phyletic gradualism

Phyletic gradualism

Definition
noun
A theory stating that evolutionary change happens slowly, steadily and gradually in an attempt of the species to continue to adapt to new challenges over the course of their history until they became (gradually) new species different from their ancestors.
Supplement
Foraminiferans, a tiny species of marine animals living in Indian ocean, are said to demonstrate this process of evolution. The species remained relatively unchanged from about 10million to 6 million years ago then began a slow modification lasting about 600 000 years till they became an entirely new and different species from their ancestors.


You will also like...

Still Water Community Plants
Still Water Community Plants

This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..

Biological Energy
ATP & ADP – Biological Energy

ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

Sensory systems
Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

Peppered moth ("Biston betularia") melanic and light form
Examples of Natural Selection

Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..

Fossil trilobite imprint in the sediment
Insects

There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

Human Reproduction
Human Reproduction

Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..

Related Articles...

No related articles found

See all Related Topics