STMS Quarter 2 Unit Test

Front

What is the correct sequence of eras of the geologic time scale in order from oldest to youngest?

Back

Paleozoic, Mesozoic, Cenozoic

Front

What significant event occurred during the Cenozoic Era?

Back

It marked the evolution of humans.

Front

What does the fossil record indicate about the majority of plants and animals that lived on Earth in the past?

Back

Most have become extinct.

Front

Which adaptation is best suited for an animal to survive in cold climates?

Back

Thick layers of fat.

Front

How can skeletons be used to determine evolutionary relationships among organisms?

Back

Organisms that have similar bone structures share a common ancestor.

Front

What is the geologic time scale?

Back

A system of chronological dating that relates geological strata to time.

Front

Define extinction in the context of species.

Back

The end of an organism or a group of organisms, resulting in no living members.

Front

What are homologous structures?

Back

Anatomical features in different species that share a common ancestry.

Front

What is the significance of the Precambrian period?

Back

It is the earliest part of Earth's history, where most life forms were simple and unicellular.

Front

What does adaptation mean in biology?

Back

A trait that helps an organism survive and reproduce in its environment.