Exam 20: Arriving Late,traveling Far: the Evolution of Human Beings

Based on evidence from "primate molecular clocks," a primate common ancestor of humans and chimpanzees existed about:

Modern humans have been in existence for approximately how many years?

According to the primate family tree,the modern species most closely related to the humans is the:

Several lines of evidence,including fossils and a genetic analysis of different groups of modern humans,suggest that our species originated and spread out from:

Refer to the figure below, and then answer the following question(s). -The missing label indicated by a "1" in the figure should be:

Homo floresiensis is a relatively new find of fossils from:

The first wave of modern human migration out of Africa began about ________.

A piece of evidence in favor of including Sahelanthropus tchadensis (Toumai)with the hominins rather than apes is that the species was likely:

The fossils of Australopithecines indicate that,even though they walked upright,their arms were longer than their legs,and their feet still contained a partially opposable big toe.What does this suggest to you about their habitat and lifestyle?

A significant difference between Neanderthals and modern humans is that Neanderthals:

Which hominin may be a direct ancestor of our genus but had long arms,short legs,and grasping feet?

The genus Kenyanthropus appears to be the immediate ancestor of the genus Homo.

Describe the characteristics that appear to differentiate humans from apes in the hominin group.

Refer to the figure below, and then answer the following question(s). -The missing label indicated by a "3" in the figure should be:

Which of the following is least important in deciding whether a fossil should be classified as a hominin?

As you know from having studied the scientific method,a hypothesis must be able to make predictions that can be proved or disproved.The "out-of-Africa" hypothesis is currently more widely accepted than the "multiregionalism" school of thought.Summarize the out-of-Africa hypothesis,and explain the genetic diversity evidence in its favor.