Evolution Crossword

Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest.
Disappearance of species from all parts of its geographical range.
Formation of new species
The geological record of organisms on earth that have been preserved in the rock in chronological order
Process by which modern organisms have descended from ancient organisms
Earths history organized into four layers
The longest division of geologic time
A long and distinct period of history with a particular feature r characteristic
One of the units in geologic time in which geologists divide eras
A period of time associated with its important events or changes
The oldest era
The middle era of earths geological history, reptiles were dominant; age of dinosaurs
65 million years ago today ( time of mammals and birds)
Animal without a backbone
An animal that has a backbone
To develop and change gradually over time
Having different types together
A technique used to determine which of the two fossils is older
a fossil that is useful for dating and correlating the strata in which it is found.
a fossil reptile of the Mesozoic era, often reaching an enormous size.