Question 1

The best-known extinction during which all dinosaurs died out completely occurred during the ________ time period.

Accepted Answer

The answer of The best-known extinction during which all dinosaurs...

Question 2

Differences in populations may arise over time when physical structures in the environment, such as mountains or large bodies of water, change. These structures are referred to as

Accepted Answer

A)  Pangaea 
B)  continental drift 
C)  macroevolution 
D)  geographical barriers 
E)  micro-isolation bottleneck effect 
A)  Pangaea 
B)  continental drift 
C)  macroevolution 
D)  geographical barriers 
E)  micro-isolation bottleneck effect

Question 3

The process of evolution ultimately depends on changes that occur in the ________ of organisms.

Accepted Answer

genes or D

Question 4

As geographically isolated human subpopulations became adapted to different environments over time, different phenotypes resulted, causing the evolution of various human ________.

Accepted Answer

The answer of As geographically isolated human subpopulations became adapted...

Question 5

Which one of the following is TRUE regarding fossils?

Accepted Answer

A)  Fossils are more likely discovered under the sea than on land. 
B)  Even though fossils from more than 200,000 different species have been found, the fossil record remains incomplete. 
C)  Because organisms are primarily composed of soft tissue, it is more likely that soft tissue is fossilized than hard tissue. 
D)  Once fossilization is complete, no further degradation of the fossil can occur. 
E)  Because fossils are so old, it is not possible to determine their age. 
A)  Fossils are more likely discovered under the sea than on land. 
B)  Even though fossils from more than 200,000 different species have been found, the fossil record remains incomplete. 
C)  Because organisms are primarily composed of soft tissue, it is more likely that soft tissue is fossilized than hard tissue. 
D)  Once fossilization is complete, no further degradation of the fossil can occur. 
E)  Because fossils are so old, it is not possible to determine their age.

Question 6

Microevolution refers to evolution of new species that occurs as a result of genetic changes.

Accepted Answer

A) True 
 B)False

Question 7

Life began on Earth approximately ________ years ago.

Accepted Answer

A)  100,000 
B)  1 million 
C)  5 million 
D)  3.8 billion 
E)  4.6 billion 
A)  100,000 
B)  1 million 
C)  5 million 
D)  3.8 billion 
E)  4.6 billion

Question 8

Extinction occurs when all individuals of a population die out.

Accepted Answer

A) True 
 B)False

Question 9

The most direct hominid ancestor to Homo sapiens is called ________.

Accepted Answer

The answer of The most direct hominid ancestor to Homo...

Question 10

According to the modern theories on how life formed on Earth, prokaryotes are thought to have evolved before eukaryotes. Provide evidence to support that pattern of evolution based on the composition of the early Earth's atmosphere.

Accepted Answer

When the Earth formed, the atmosphere wa

Question 11

The largest mass extinction in the history of Earth occurred during the Triassic period; the extinction was largely due to global warming and a period of high carbon dioxide concentration in the atmosphere.

Accepted Answer

A) True 
 B)False

Question 12

The process by which the continental plates move slowly over time is called ________.

Accepted Answer

The answer of The process by which the continental plates...

Question 13

Anatomical parts of the body that serve little or no function are referred to as

Accepted Answer

A)  homologous structures 
B)  hyperplasia 
C)  vestigial structures 
D)  somites 
E)  dysplasia 
A)  homologous structures 
B)  hyperplasia 
C)  vestigial structures 
D)  somites 
E)  dysplasia

Question 14

Primitive eukaryotic photosynthetic organisms were responsible for producing oxygen gas in the atmosphere.

Accepted Answer

A) True 
 B)False

Question 15

Geographical barriers, such as large bodies of water and mountains, can result in a founder effect.

Accepted Answer

A) True 
 B)False

Question 16

As oceans began to form on Earth billions of years ago, they were small, warm, and not very salty.

Accepted Answer

A) True 
 B)False

Question 17

-Based on the figure above, which one of the following appears to be in the direct ancestral path of modern humans?

Accepted Answer

A)  Homo heidelbergensis 
B)  Australopithecus afarensis 
C)  Homo ergaster 
D)  Homo neanderthalensis 
E)  Homo floresiensis 
A)  Homo heidelbergensis 
B)  Australopithecus afarensis 
C)  Homo ergaster 
D)  Homo neanderthalensis 
E)  Homo floresiensis

Question 18

Homo habilis is considered to be the first of our human ancestors to make tools.

Accepted Answer

A) True 
 B)False

Exam 22: Evolution and the Origins of Life

The best-known extinction during which all dinosaurs died out completely occurred during the ________ time period.

Differences in populations may arise over time when physical structures in the environment, such as mountains or large bodies of water, change. These structures are referred to as

The process of evolution ultimately depends on changes that occur in the ________ of organisms.

As geographically isolated human subpopulations became adapted to different environments over time, different phenotypes resulted, causing the evolution of various human ________.

Which one of the following is TRUE regarding fossils?

Microevolution refers to evolution of new species that occurs as a result of genetic changes.

Life began on Earth approximately ________ years ago.

Extinction occurs when all individuals of a population die out.

The most direct hominid ancestor to Homo sapiens is called ________.

According to the modern theories on how life formed on Earth, prokaryotes are thought to have evolved before eukaryotes. Provide evidence to support that pattern of evolution based on the composition of the early Earth's atmosphere.

The largest mass extinction in the history of Earth occurred during the Triassic period; the extinction was largely due to global warming and a period of high carbon dioxide concentration in the atmosphere.

The process by which the continental plates move slowly over time is called ________.

Anatomical parts of the body that serve little or no function are referred to as

Primitive eukaryotic photosynthetic organisms were responsible for producing oxygen gas in the atmosphere.

Geographical barriers, such as large bodies of water and mountains, can result in a founder effect.

As oceans began to form on Earth billions of years ago, they were small, warm, and not very salty.

-Based on the figure above, which one of the following appears to be in the direct ancestral path of modern humans?

Homo habilis is considered to be the first of our human ancestors to make tools.

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Structure and Function of Cells

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The Respiratory System: Exchange of Gases

The Nervous System: Integration and Control

Sensory Mechanisms

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The Urinary System

Reproductive Systems

Cell Reproduction and Differentiation

Cancer: Uncontrolled Cell Division and Differentiation

Genetics and Inheritance

DNA Technology and Genetic Engineering

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