Exam 22: Evolution and Our Heritage

________ dating uses potassium/argon ratios and can be used to determine absolute age.

Match each definition in the first column to the correct term in the second column. -These slender or gracile australopithecines are found later in the fossil record than A.afarensis.

Which refers to the different rates at which various traits evolve?

Which of the following species is most likely to be infected with the newly discovered human virus Zeta 1?

Which of the following is true of chimpanzees compared with humans?

One result of natural selection is that populations become better suited to their particular environment by a process called ________.

Match each definition in the first column to the correct term in the second column. -A hominin thought to have displayed facultative bipedalism.

A protein similar to the human Rh blood factor (due to a specific set of genes)can be found in many animals.In which of the following is it least likely to be found?

The proposition that the mitochondria in our cells descended from engulfed bacteria is called the ________ theory.

A(n)________ is a group of individuals of the same species that live in a particular area.

Match each definition in the first column to the correct term in the second column. -According to the text,this is the earliest member of the genus Homo to appear in the fossil record.

Match each definition in the first column to the correct term in the second column. -The Amish are a small,isolated group of people who came from Europe and settled in the United States.There is a set of unusual genetic conditions among them.This type of genetic drift is called ________.

Explain the basic ideas of natural selection proposed by Charles Darwin.

Which of the following is one method of acquiring genetic changes in a population caused by a change in the DNA?

________ occurs when allele frequencies within a population change randomly because of chance alone.

Genetic drift that occurs in small,new colonies is called ________.

A difference in appearance between males and females in a species is called ________.

Imagine that you are an archaeologist on a dig somewhere in East Asia and you begin to excavate an area littered with stone tools that also has the remains of an ancient fire.Subsequent carbon dating of the charcoal from the fire yields a date of 200,000 years before the present.Given these circumstances,which species would you expect most likely set that fire?

Broadly defined,________ is descent with modification from a common ancestor.

Today's atmosphere on Earth is made up of nitrogen,oxygen,carbon dioxide,and water.According to all models,which of these was largely absent 3.8 billion years ago?