Different sizes, shapes and colors are usually . . .

He proposed evolution due to the environment.

He proposed evolution by natural selection.

Trace of an organism that existed in the past.

Features allowing organisms to better survive its environment.

Selection where humans breed species based on favorable traits.

Selection by which the environment determines an organisms traits.

The ability to pass on traits from one generation to the next.

Measure of how well an organism can survive and produce offspring.

Producing more offspring than will survive to increase the probability of survival.

Allows scientists' to determine age, common ancestors, location or environment.

Natural selection results with adaptations suited for survival and reproduction is.

Which description most accurately describes natural selection?

Which of the following represents a pair of homologous structures?

Organs that have similar functions but different structures.

What is an inherited trait that increases an organisms chance of surviving and reproducing?

The process of change over a period of time is called

Which layer contains the YOUNGEST fossils?

The process where organisms with favorable adaptations are most likely to survive is called

What did Darwin help to explain?

According to Darwin, why did the Galapagos finches have different beaks?