The Following Questions Refer to the Evolutionary Tree in the Figure

question 5

Multiple Choice

The following questions refer to the evolutionary tree in the figure below.
The horizontal axis of the cladogram depicted below is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V-Z) represent various common ancestors. Let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.

-Which of the five common ancestors, labeled V-Z, is the common ancestor of the greatest number of species, both living and extinct?

• A) V
• B) W
• C) Y
• D) Z

---

Definitions:

Land Ethics

A philosophy that stresses the interdependence between humans and the land, promoting the responsible use and conservation of natural resources.

Proponent

A person who advocates or supports a particular idea, policy, or project.

Agricultural Revolution

A period of technological advancement and increased crop productivity that began in the 18th century, drastically altering agricultural practices.

Years Ago

A phrase used to indicate a specific amount of time in the past from the present moment.