All the individuals of one type (species) in a certain area is called _____________________.

Any preserved remains of ancient organisms (imprint in rock, or bones, teeth, seashells, etc. are called _________.

In Science a broad statement meaning well supported by evidence is ___________________.

________________________ means the "survival of the fittest." - organisms with the traits best matched to the environment will survive to reproduce and pass on their genes.

Ability to breed successfully and produce healthy offspring; a "fit" organism  reproduces and leaves behind offspring.

A characteristic (trait), structural or behavioral, that gives an organism a selective (competitive) advantage in its environment.

Organisms are related to one another after descending from a common ancestor; changes occur over very long time periods.

The idea that evolution occurred/occurs slowly and steadily over a long period of time.

When a single species evolves into different forms (eventually could be different species) that occupy different niches (Darwin's finches).

When humans breed plants or animals for desirable traits. 

Evolution of a new species; can occur as a population changes over a very long period of time; may happen due to isolation

When two groups of individuals of the same type become isolated from each other and can no longer breed; islands, fires, agricultures, etch.

An abrupt change leads to the relatively sudden formation of a new species.