Exam 1: Chapter 18: Evolution and Natural Selection

Charles Darwin

______ observed that beak shape varies among finch species. He postulated that the beak of an ancestral species had adapted over time to equip the finches to acquire different food sources.

Charles Darwin Alfred Wallace

Both _____________ and ______________ wrote scientific papers on natural selection that were presented together before the Linnean Society in 1858.

heritable

One of Darwin’s Postulates: Most characteristics are ________, passed from parent to offspring.

produced competition

One of Darwin’s Postulates: More offspring are _______ than can survive; there is ________ for resources

Characteristics

One of Darwin’s Postulates: __________ of offspring vary, and these variations are heritable.

adaptation

One of Darwin’s Postulates: When species change to better survive their environment, this is called __________.

30 Years

How long did Darwin wait before publishing his ideas on evolution?

Alfred Russell Wallace Charles Darwin

__________ and ___________ co-published paper on natural selection first (1858)

On the Origin of Species by Means of Natural Selection

Charles Darwin’s book that was published in 1859.