Unit 7 Review

The evolutionary history of an organism is portrayed by its...

• Phylogeny

• Cladogram

• DNA

• Fossil

Answer explanation

Phylogeny is like its family tree! It shows how organisms evolved from a common ancestor. The cladogram simply shows shared traits.

This image shows a cladogram. Which of the following best describes its purpose?

• Shows organisms that do not show any evolutionary relationship.

• It is used to show how each organism obtains its energy,

• Shows the relationships between organisms based on characteristics.

• Demonstrates how one organism evolved into another.

Answer explanation

Cladograms are created by organizing organisms based on similar characteristics.

The type of evolution where closely related organisms that share a common ancestor evolve differences over time that results in speciation.

Answer explanation

What is the most accurate fossil dating method used to get the exact date of a fossil?

• cladogram

• observations

• Law of Superstition

• radiometric dating

The fossil dating method where they aged fossils based on their position in the earth's crust.

• Radiometric dating

• Law of Superstition

• Rock cycle

• Fossil record

The type of evolution where organisms are not closely related but independently evolve similar characteristics for a similar function.

A unit of DNA that determines a specific structure and function of an organism is called a...

• gene

• characteristic

• trait

• nucleus

Answer explanation

DNA is full of genetic codes for an entire organism's development and function.

Gene = segment of DNA (ex: eye color)

Trait = specific characteristic of a gene (ex: blue eyes)

Which of the following is an example of a trait?

• Sense of humor

• eye color

• brown eyes

• height

Passing down characteristics from parents to offspring is referred to as...

• Genetic drift

• Gene flow

• Inheritance

• Mutation

Purple butterflies migrating from the north to the south during the winter and mating with orange butterflies is an example of...

• genetic drift

• gene flow

• mutation

• selective breeding

Answer explanation