Ch. 5 7th GD Science

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of a living organism from the past.

Front

What does uniformitarianism state?

Back

Uniformitarianism states that the Earth has always developed at the same, slow rate over time.

Front

What is meant by 'kind' in biological terms?

Back

A 'kind' refers to a group of organisms that can reproduce together, but their offspring may be sterile.

Front

Is it true that Gregor Mendel sailed to the Gale Force Islands to develop his theory of evolution?

Back

False. Gregor Mendel is known for his work in genetics, not for sailing to develop theories of evolution.

Front

What are homologous structures?

Back

Homologous structures are organs shared by different organisms that have a similar structure but may serve different functions.

Front

What is the significance of vestigial organs?

Back

Vestigial organs are remnants of organs that had a function in early ancestors but are no longer useful in the current organism.

Front

Define evolution in biological terms.

Back

Evolution is the process through which species change over time through variations and natural selection.

Front

What is natural selection?

Back

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is a common ancestor?

Back

A common ancestor is a species from which two or more different species have evolved.

Front

What are analogous structures?

Back

Analogous structures are body parts in different species that have similar functions but do not share a common evolutionary origin.