Unit 2 Test: Geologic Time Scale and Cladistics_MakeUp Test

Front

What is a phylogenetic tree?

Back

A diagram that shows the branching patterns and evolutionary relationships between different species or groups of organisms.

Front

What does the law of crosscutting state?

Back

The law of crosscutting states that a fault (or intrusive magma) is younger than the rocks it cuts through.

Front

What do branching points in a phylogenetic tree represent?

Back

Common ancestors of the species or groups of organisms.

Front

During which eon did single-celled organisms first appear?

Back

Archean Eon.

Front

What is a cladogram?

Back

A type of diagram that shows the relationships among different species based on shared characteristics.

Front

What is the significance of the Archean Eon in the Geologic Time Scale?

Back

It marks the time when single-celled organisms first appeared on Earth.

Front

How do scientists use phylogenetic trees in biology?

Back

To illustrate the evolutionary relationships and common ancestry among species.

Front

What is the difference between a phylogenetic tree and a cladogram?

Back

A phylogenetic tree shows evolutionary relationships with time, while a cladogram focuses on the branching patterns without time.

Front

What does it mean if two species share a common ancestor?

Back

It indicates that they have evolved from a shared lineage and may have similar traits.

Front

What is the purpose of using the Geologic Time Scale?

Back

To organize Earth's history and the timing of major geological and biological events.