Question 1

The first eukaryotes evolved approximately ________ years ago.

Accepted Answer

A) 200,000 
B) 200 million 
C) 2 billion 
D) 2 trillion 
A) 200,000 
B) 200 million 
C) 2 billion 
D) 2 trillion

Question 2

The fossil record indicates that species have become extinct throughout the history of life.There have been five ________,during which greater than 50 percent of Earth's species became extinct.

Accepted Answer

The answer of The fossil record indicates that species have...

Question 3

The mass extinction at the end of the Ordovician period killed

Accepted Answer

A) 50 percent of marine animal families,including many trilobites. 
B) 50 percent of terrestrial and marine animal families,including many trilobites. 
C) 90 percent of terrestrial and marine animal families,and 100 percent of terrestrial plants. 
D) 100 percent of trilobites and 90 percent of terrestrial and marine animal families. 
A) 50 percent of marine animal families,including many trilobites. 
B) 50 percent of terrestrial and marine animal families,including many trilobites. 
C) 90 percent of terrestrial and marine animal families,and 100 percent of terrestrial plants. 
D) 100 percent of trilobites and 90 percent of terrestrial and marine animal families.

Question 4

MATCHING
Correctly match the definition with the correct geologic time period
-Cambrian

Accepted Answer

A) repeated advance and retreat of glaciers; evolution of humans; extinction of large mammals and birds; 0-2.6 mya 
B) continents begin to separate; diverse dinosaurs; first birds; first flowering plants; 145-200 mya 
C) extensive forests; amphibians dominate life on land; increase in diversity of insects; first reptiles; 300-360 mya 
D) further increases in diversity of marine invertebrates and vertebrates; plants and fungi begin to colonize land; mass extinction at end of period; 445-490 mya 
E) origin of life; photosynthesis causes oxygen content of Earth's atmosphere to increase; first eukaryotes; first multicellular organisms; 540 mya-3.8 bya
F)continents near present positions; increased diversity of flowering plants, birds, mammals, and pollinating insects; 2.6-65 mya
G)early dinosaurs; first mammals; mass extinction at end of period; 200-250 mya
H)increase in diversity of land plants; first amphibians colonize land; mass extinction late in period; 360-415 mya
I)large and relatively sudden increase in the diversity of animal life; increase in diversity of algae; first vertebrates; 490-540 mya
J)flowering plants begin to dominate life on land; mass extinction at end of period, including extinction of the last dinosaurs; 65-145 mya
K)continents come together to form Pangaea; reptiles dominate life on land by 265 mya; mass extinction at end of period; 250-300 mya
L)increase in diversity of fishes; first hints of colonization of land by insects and other invertebrates; 415-445 mya 
A) repeated advance and retreat of glaciers; evolution of humans; extinction of large mammals and birds; 0-2.6 mya 
B) continents begin to separate; diverse dinosaurs; first birds; first flowering plants; 145-200 mya 
C) extensive forests; amphibians dominate life on land; increase in diversity of insects; first reptiles; 300-360 mya 
D) further increases in diversity of marine invertebrates and vertebrates; plants and fungi begin to colonize land; mass extinction at end of period; 445-490 mya 
E) origin of life; photosynthesis causes oxygen content of Earth's atmosphere to increase; first eukaryotes; first multicellular organisms; 540 mya-3.8 bya
F)continents near present positions; increased diversity of flowering plants, birds, mammals, and pollinating insects; 2.6-65 mya
G)early dinosaurs; first mammals; mass extinction at end of period; 200-250 mya
H)increase in diversity of land plants; first amphibians colonize land; mass extinction late in period; 360-415 mya
I)large and relatively sudden increase in the diversity of animal life; increase in diversity of algae; first vertebrates; 490-540 mya
J)flowering plants begin to dominate life on land; mass extinction at end of period, including extinction of the last dinosaurs; 65-145 mya
K)continents come together to form Pangaea; reptiles dominate life on land by 265 mya; mass extinction at end of period; 250-300 mya
L)increase in diversity of fishes; first hints of colonization of land by insects and other invertebrates; 415-445 mya

Question 5

The Cambrian explosion

Accepted Answer

A) caused a lack of air in Earth's atmosphere. 
B) was caused by an increase in volcanic activity. 
C) was volcanic in nature. 
D) increased the diversity of animal life on Earth. 
A) caused a lack of air in Earth's atmosphere. 
B) was caused by an increase in volcanic activity. 
C) was volcanic in nature. 
D) increased the diversity of animal life on Earth.

Question 6

MATCHING
Correctly match the definition with the correct geologic time period
-Ordovician

Accepted Answer

A) repeated advance and retreat of glaciers; evolution of humans; extinction of large mammals and birds; 0-2.6 mya 
B) continents begin to separate; diverse dinosaurs; first birds; first flowering plants; 145-200 mya 
C) extensive forests; amphibians dominate life on land; increase in diversity of insects; first reptiles; 300-360 mya 
D) further increases in diversity of marine invertebrates and vertebrates; plants and fungi begin to colonize land; mass extinction at end of period; 445-490 mya 
E) origin of life; photosynthesis causes oxygen content of Earth's atmosphere to increase; first eukaryotes; first multicellular organisms; 540 mya-3.8 bya
F)continents near present positions; increased diversity of flowering plants, birds, mammals, and pollinating insects; 2.6-65 mya
G)early dinosaurs; first mammals; mass extinction at end of period; 200-250 mya
H)increase in diversity of land plants; first amphibians colonize land; mass extinction late in period; 360-415 mya
I)large and relatively sudden increase in the diversity of animal life; increase in diversity of algae; first vertebrates; 490-540 mya
J)flowering plants begin to dominate life on land; mass extinction at end of period, including extinction of the last dinosaurs; 65-145 mya
K)continents come together to form Pangaea; reptiles dominate life on land by 265 mya; mass extinction at end of period; 250-300 mya
L)increase in diversity of fishes; first hints of colonization of land by insects and other invertebrates; 415-445 mya 
A) repeated advance and retreat of glaciers; evolution of humans; extinction of large mammals and birds; 0-2.6 mya 
B) continents begin to separate; diverse dinosaurs; first birds; first flowering plants; 145-200 mya 
C) extensive forests; amphibians dominate life on land; increase in diversity of insects; first reptiles; 300-360 mya 
D) further increases in diversity of marine invertebrates and vertebrates; plants and fungi begin to colonize land; mass extinction at end of period; 445-490 mya 
E) origin of life; photosynthesis causes oxygen content of Earth's atmosphere to increase; first eukaryotes; first multicellular organisms; 540 mya-3.8 bya
F)continents near present positions; increased diversity of flowering plants, birds, mammals, and pollinating insects; 2.6-65 mya
G)early dinosaurs; first mammals; mass extinction at end of period; 200-250 mya
H)increase in diversity of land plants; first amphibians colonize land; mass extinction late in period; 360-415 mya
I)large and relatively sudden increase in the diversity of animal life; increase in diversity of algae; first vertebrates; 490-540 mya
J)flowering plants begin to dominate life on land; mass extinction at end of period, including extinction of the last dinosaurs; 65-145 mya
K)continents come together to form Pangaea; reptiles dominate life on land by 265 mya; mass extinction at end of period; 250-300 mya
L)increase in diversity of fishes; first hints of colonization of land by insects and other invertebrates; 415-445 mya

Question 7

In the evolutionary tree below,which of the nodes corresponds to the most recent common ancestor of Troodontids,Dromaeosaurids,and Archaeopteryx?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 8

Upon examining specimens recovered from the small intestine of a murder victim during the autopsy,you find clusters of cells that are attached to each other by shared cell walls.The outer layers of these cells are covered with a waxy cuticle,and there is evidence of many green organelles inside the more intact cells in the clusters.What type of cells would you propose you are examining?

Accepted Answer

A) plant cells 
B) fungal cells 
C) bacteria 
D) protozoan cells 
A) plant cells 
B) fungal cells 
C) bacteria 
D) protozoan cells

Question 9

About 540 mya,there was an astonishing burst of evolutionary activity that correlated to the first appearance in the fossil record of most of the major living animal groups.Popularly known as the ________,this geologic time changed the face of life on Earth.

Accepted Answer

The answer of About 540 mya,there was an astonishing burst...

Question 10

Explain two ways that mass extinctions can have a profound impact on evolved biodiversity in the ecosystem.

Accepted Answer

One way that a mass extinction impacts b

Question 11

Imagine the discovery of an undescribed nonphotosynthetic,multicellular organism.To determine whether it is a(n)________,you would need to examine it microscopically to determine if its ________.

Accepted Answer

A) animal or fungi;cells have cell walls 
B) animal or plant;cells have nuclei 
C) plant or fungi;cells have cell walls 
D) animal or fungi;cells contain DNA 
A) animal or fungi;cells have cell walls 
B) animal or plant;cells have nuclei 
C) plant or fungi;cells have cell walls 
D) animal or fungi;cells contain DNA

The first eukaryotes evolved approximately ________ years ago.

The fossil record indicates that species have become extinct throughout the history of life.There have been five ________,during which greater than 50 percent of Earth's species became extinct.

The mass extinction at the end of the Ordovician period killed

MATCHING Correctly match the definition with the correct geologic time period -Cambrian

The Cambrian explosion

MATCHING Correctly match the definition with the correct geologic time period -Ordovician

In the evolutionary tree below,which of the nodes corresponds to the most recent common ancestor of Troodontids,Dromaeosaurids,and Archaeopteryx?

About 540 mya,there was an astonishing burst of evolutionary activity that correlated to the first appearance in the fossil record of most of the major living animal groups.Popularly known as the ________,this geologic time changed the face of life on Earth.

Explain two ways that mass extinctions can have a profound impact on evolved biodiversity in the ecosystem.

Imagine the discovery of an undescribed nonphotosynthetic,multicellular organism.To determine whether it is a(n),you would need to examine it microscopically to determine if its .

The Nature of Science

Chemistry of Life

Life Is Cellular

How Cells Work

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Ecosystems

Applying the Science

Filters

Exam 13: The History of Life

The first eukaryotes evolved approximately ________ years ago.

The fossil record indicates that species have become extinct throughout the history of life.There have been five ________,during which greater than 50 percent of Earth's species became extinct.

The mass extinction at the end of the Ordovician period killed

MATCHING Correctly match the definition with the correct geologic time period -Cambrian

The Cambrian explosion

MATCHING Correctly match the definition with the correct geologic time period -Ordovician

In the evolutionary tree below,which of the nodes corresponds to the most recent common ancestor of Troodontids,Dromaeosaurids,and Archaeopteryx?

About 540 mya,there was an astonishing burst of evolutionary activity that correlated to the first appearance in the fossil record of most of the major living animal groups.Popularly known as the ________,this geologic time changed the face of life on Earth.

Explain two ways that mass extinctions can have a profound impact on evolved biodiversity in the ecosystem.

Imagine the discovery of an undescribed nonphotosynthetic,multicellular organism.To determine whether it is a(n)________,you would need to examine it microscopically to determine if its ________.

The Nature of Science

Chemistry of Life

Life Is Cellular

How Cells Work

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Ecosystems

Applying the Science

Filters

Imagine the discovery of an undescribed nonphotosynthetic,multicellular organism.To determine whether it is a(n),you would need to examine it microscopically to determine if its .