Biology Crossword

major evolutionary change over a long period
the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock
all the inhabitants of a particular town, area, or country
the branch of science concerned with classification, especially of organisms; systematics
the formation of new and distinct species in the course of evolution
the influence of closely associated species on each other in their evolution
the state or process of a species, family, or larger group dying out
gradual development
the theory that changes in the earth's crust during geological history have resulted chiefly from sudden violent and unusual events
a structure in an organism that has lost all or most of its original function in the course of evolution
a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding
evolutionary change within a species or small group of organisms, especially over a short period
evolution proceeds chiefly by the accumulation of small changes
an organism's ability to survive and reproduce
a different or distinct form of something
is the transfer of alleles or genes from one population to another