Question 1

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

Question 2

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 byaF) continents near present positions; increased diversity of flowering plants, birds, mammals, and pollinating insects; 2.6-65 myaG) early dinosaurs; first mammals; mass extinction at end of period; 200-250 myaH) increase in diversity of land plants; first amphibians colonize land; mass extinction late in period; 360-415 myaI) large and relatively sudden increase in the diversity of animal life; increase in diversity of algae; first vertebrates; 490-540 myaJ) flowering plants begin to dominate life on land; mass extinction at end of period, including extinction of the last dinosaurs; 65-145 myaK) continents come together to form Pangaea; reptiles dominate life on land by 265 mya; mass extinction at end of period; 250-300 myaL) increase in diversity of fishes; first hints of colonization of land by insects and other invertebrates; 415-445 mya

Question 3

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

Question 4

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.

Question 5

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

Question 6

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 byaF) continents near present positions; increased diversity of flowering plants, birds, mammals, and pollinating insects; 2.6-65 myaG) early dinosaurs; first mammals; mass extinction at end of period; 200-250 myaH) increase in diversity of land plants; first amphibians colonize land; mass extinction late in period; 360-415 myaI) large and relatively sudden increase in the diversity of animal life; increase in diversity of algae; first vertebrates; 490-540 myaJ) flowering plants begin to dominate life on land; mass extinction at end of period, including extinction of the last dinosaurs; 65-145 myaK) continents come together to form Pangaea; reptiles dominate life on land by 265 mya; mass extinction at end of period; 250-300 myaL) increase in diversity of fishes; first hints of colonization of land by insects and other invertebrates; 415-445 mya

Question 7

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 8

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.

Question 9

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 10

The first eukaryotes evolved approximately ________ years ago.

Accepted Answer

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

Question 11

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...

Exam 13: The History of Life

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

Correct Answer
verified

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.

Correct Answer
verified

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 .

Correct Answer
verified

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

Correct Answer
verified
One way that a mass extinction impacts b...
View Answer

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

Correct Answer
verified

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.

Correct Answer
verified

The first eukaryotes evolved approximately ________ years ago.

Correct Answer
verified

The Cambrian explosion

Correct Answer
verified

The mass extinction at the end of the Ordovician period killed

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Exam 13: The History of Life

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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 ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedOne way that a mass extinction impacts b...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

The first eukaryotes evolved approximately ________ years ago.

Correct AnswerverifiedShow Answer

The Cambrian explosion

Correct AnswerverifiedShow Answer

The mass extinction at the end of the Ordovician period killed

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

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 .

Correct Answer
verified

Correct Answer
verified
One way that a mass extinction impacts b...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified