He traveled to the Galapagos Islands on the HMS Beagle observed similar species suited to their environment.

A long slow change in orgnaisms over time.

mineralized remains of organisms usually found in sedimentary rock.

When species lack the variations necessary to adapt to a changing environment.

Swedish botanist that developed a two-word naming system.

This person suggested that there would soon be insufficient food and living space for the growing population.

Any inherited trait or characteristic that increases and organisms chances for survival.

Structures that have similar embryological origin and structure but are adapted for different purposes.

Two populations are capabale of interbreeding but have differences in courtship rituals or other reproductive strategies that involve behavior.

The largest category of organisms with the fewest of traits in common.

He proposed that giraffes got their long necks form stretching?

Sudden change in the DNA sequence.

Fossil records, Geographical distribution, Homologous Structures, Vestigial organs, Similarities in Embryology.

Two populations are seperated by geographic barriers such as rivers, mountain, or other bodies of water.

The most speific level of classification in which organisms have the most traits in common.

Geologist that proposed Earth to be many millions of years old, older than anyone believed.

Combined genetic make-up of all the members of a population.

Appendix in humans, Leg Bones in whales.

Two or more species reproduce at different times and therefore, cannot interbreed.

The 2-word scientific naming of an organism.

Proccess by which individuals better suited to their environment can survive and reproduce most successfully.

Process by which humans choose the most desirabletraits of a population for breeding purposes.

The early stages of development in organism in which there are many similarities among different species.

The historical event in england caused tree trunks and buildings to blacken with soot allowing birds and other predators to hunt the light colored moths more easily

The two levels of classification used to name an organism.