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CHAPTER 14. THE ORIGIN OF SPECIES. 4. Cont. Species: . PROCESS OF SPECIATION. REPRODUCTIVE ISOLATION. HORSE. DONKEY. MULE. A "Liger”, a Lion/Tiger hybrid. A "Zeedonk", a zebra/donkey hybrid (does not occur in the wild). (Ligers exist only in captivity) .

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Chapter 14

CHAPTER 14

THE ORIGIN OF SPECIES



Process of speciation

PROCESSOF SPECIATION

REPRODUCTIVE ISOLATION


HORSE

DONKEY

MULE


A "Liger”, a Lion/Tiger hybrid

A "Zeedonk", a zebra/donkey hybrid

(does not occur in the wild)

(Ligers exist only in captivity)

Fertile Canid hybrids occur between coyotes, wolves, dingoes, jackals and domestic dogs.



  • 6. Tempo of Speciation:

    • Punctuated equilibrium model: Abrupt periods of

    • speciation and long periods of little change.

b. Gradualism model: Big changes (speciation) occur

By the steady accumulation of many small changes.


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