Or are the differences among the races more profound, such that they form independent though related species, like wolves, dogs and foxes?

Despite the wide numbers of metal ion donors, they serve to form only a few atomic and molecular species that are useful as light emitters.

Silky Wilsonia is a low-growing mat forming species, growing to 10 cm tall.

Basal species, such as plants, form the first level and are the resource limited species that feed on no other living creature in the web.

The puna flora is characterized by its unique assemblages of cushion and mat forming species.

When a solute dissolves, it may form several species in the solution.

Each of the castes, such as the Masters and Engineers, are so different genetically that they form separate species.

Genetic isolates may form new species in several ways:

One reason for the skepticism is that another way for forming new species is well supported by evidence.

This means that they are very unlikely to form albino lineages that might lead to the creation of a new subspecies, or species.