Anthropology5_Problem_Set_4

Anthropology5_Problem_Set_4 - Anthropology 005 Introduction...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Anthropology 005 Introduction to Physical Anthropology Problem Set # 4: Speciation, classification and the comparative method 1. There are millions of reproductively isolated species now in existence yet we believe all organisms are related. A. What does it mean to say that all organisms are related? It means that all organisms shared a common ancestor many generations ago. B. What is the best evidence that they are related? The best evidence that organisms are related is their shared characteristics, especially derived similarities for finding which organisms are most closely related. This evidence can also be seen through fossil records. DNA. Hereditary System C. The allopatric model suggests how new species might evolve. In general, what two circumstances are thought to be essential to the division of one interbreeding population into two reproductively isolated ones? Ecological separation of populations within the same geographic range can lead to the divisions of one interbreeding populating into two reproductively isolated ones. Also, this physical barrier causes the populations to breed with themselves and thus over time each species may have different alleles according to which is best for their reproduction and survival, eventually leading to different genes and not being able to reproduce with the original group. 2. Classification is important in biology for several reasons.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/25/2011 for the course ANTH 5 taught by Professor Gaulin during the Fall '07 term at UCSB.

Page1 / 2

Anthropology5_Problem_Set_4 - Anthropology 005 Introduction...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online