Exam 22: Evolution and Our Heritage

Match each definition in the first column to the correct term in the second column. -The "Upright Man" who possibly evolved in east Africa and first appears in the fossil record about 1.6 million years ago and was a wanderer or nomad.

Which of the following refers to the ability of early hominins to walk on two feet?

The Euphorbia of desert parts of Africa and India are succulent and have thorns but are superficially very similar to the unrelated cacti native to the deserts of the Americas.This pair of plant groups represents an example of ________.

________ can behave as an enzyme and may have been the first macromolecule leading to the first cells.

You,as a cell biologist,discover that there is strong evidence that chloroplasts,found in plant and algal cells,are descended from bacteria but not eukaryotes.What theory would explain this finding?

Which suggests that life evolved from chemicals slowly increasing in complexity over a period of millions of years?

________ is the study of the geographic distribution of organisms.

If the atmospheric layer known as the ________ were to disappear,we would be exposed to intense ultraviolet radiation.

Which of the following is not a primate characteristic?

Match each definition in the first column to the correct term in the second column. -The group of hominins living in the colder climates of Europe who have larger brains than modern humans.

How does fitness relate to family size?

A group of living things whose members can successfully breed with one another is called a(n)________.

Changes that occur at the genetic level in populations are classified as ________.

If an average female A.afarensis weighed 24 kg,what would you estimate the weight of an average male to be?

Match each definition in the first column to the correct term in the second column. -Whales appear to be most closely related to cows based on the presence of a specifically shaped ________ in the feet of ancient whale ancestors.

If many living and fossil species of camelids,a mammal family containing camels,lamas,and alpacas,can be found in the Americas,but only two can be found in Asia and one can be found in Africa,camelids probably evolved in ________.

Almost all cacti are native to the Americas,but there is a small,relatively uncommon group of plants closely related to cacti native to tropical western Africa.How can we explain this given the information in this chapter?

Match each definition in the first column to the correct term in the second column. -This living animal is most likely to share the most diseases with humans,given that the more closely related two things are,the more likely they are to suffer from the same infectious diseases.

The adult human jawbone,or mandible,arises embryonically from a gill arch.The arch and the mandible are said to be ________.

Before contact with Europeans,the people of a tiny,isolated group of South Pacific islands had a population of around 50,000 people.Because of poor management of their own resources,the population fell to around 5000 by about the year 1750.When Europeans finally arrived,they brought smallpox and after the ensuing epidemic,only about 800 islanders were left alive.The unusual genetic makeup of the native population is due to what phenomenon?