Which Ancestor of the Modern-Day Horse Is Also the Closest

question 107

Multiple Choice

Which ancestor of the modern-day horse is also the closest common ancestor to Parahippus?

• A) Calippus
• B) Orohippus
• C) Miohippus
• D) Epihippus
• E) Hypohippus

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Definitions:

Rotary International

An international service organization that brings together business and professional leaders to provide humanitarian service and to advance goodwill and peace around the world.

Circulatory System

Organ system consisting of a heart or hearts and vessels that distribute circulatory fluid through a body.

Tracheal Tubes

A system of air-filled tubes in insects and some other arthropods that allow for gas exchange directly with body cells.

Spiracles

Small openings found on the surface of some animals, such as insects and spiders, that lead to their respiratory systems.