Isolating Mechanisms — Definition & Examples

By AAlana Karras

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Alana Karras
Sylvia Freeman

This is a photo of a zorse. A zorse looks like a slighter smaller horse with the characteristic black strips of a zebra. — Image source: By Kumana @ Wild Equines CC BY 2.0, via Wikimedia Commons

This unusual looking creature is called a Zorse: a cross of a zebra and a horse. While the Zorse can live into maturity, it is sterile. What does this say about zebra and horse species?

Choose one answer

Option A: A

Horses and Zebra are both mammals and are therefore members of the same species.

Option B: B

Horses and Zebra are considered the same species because they can produce offspring

Option C: C

Horses and Zebra are still considered separate species because the Zorse is not beneficial to its environment

Option D: D

Horses and Zebra are still considered separate species because the Zorse cannot reproduce

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