Question 1

Mammals appeared 220 million years ago but did not begin to greatly diversify until 65 million years ago. Why is this?

Accepted Answer

​During the first 155 million years of m

Question 2

Choose the one most appropriate letter for each.
-caecilians

Accepted Answer

A) ​cartilaginous skeleton; jaws 
B) ​reptile with four-chambered heart 
C) ​placental mammal 
D) ​legless amphibian 
E) ​invertebrate chordate; no metamorphosis
F)​endotherm with feathers
G)​limbless reptile
H)​most primitive fishes with jaws; extinct
I)​modern-day parasitic jawless vertebrate
J)​marsupial
K)​adult is called "sea squirt"
L)​egg-laying mammal
M)​swim bladder for buoyancy
N)​may be sexually mature in larval form 
A) ​cartilaginous skeleton; jaws 
B) ​reptile with four-chambered heart 
C) ​placental mammal 
D) ​legless amphibian 
E) ​invertebrate chordate; no metamorphosis
F)​endotherm with feathers
G)​limbless reptile
H)​most primitive fishes with jaws; extinct
I)​modern-day parasitic jawless vertebrate
J)​marsupial
K)​adult is called "sea squirt"
L)​egg-laying mammal
M)​swim bladder for buoyancy
N)​may be sexually mature in larval form

Question 3

Use the figure above to answer questions
-The letter "D" in the accompanying figure represents which teeth?​

Accepted Answer

A)  ​incisors 
B)  ​molars 
C)  ​canines 
D)  ​premolars 
E)  ​grinders 
A)  ​incisors 
B)  ​molars 
C)  ​canines 
D)  ​premolars 
E)  ​grinders

Question 4

Most amphibians are completely dependent on an aquatic environment for ____.

Accepted Answer

A)  ​respiration 
B)  ​feeding 
C)  ​reproduction 
D)  ​movement 
E)  ​thermoregulation 
A)  ​respiration 
B)  ​feeding 
C)  ​reproduction 
D)  ​movement 
E)  ​thermoregulation

Question 5

Birds and crocodiles share which of the following characteristics?​

Accepted Answer

A)  ​ectothermy 
B)  ​body hair 
C)  ​four-chambered heart 
D)  ​lung design 
E)  ​light-weight bones 
A)  ​ectothermy 
B)  ​body hair 
C)  ​four-chambered heart 
D)  ​lung design 
E)  ​light-weight bones

Question 6

The first jawless fishes evolved by about ____ million years ago.

Accepted Answer

A)  ​120 
B)  ​270 
C)  ​380 
D)  ​480 
E)  ​650 
A)  ​120 
B)  ​270 
C)  ​380 
D)  ​480 
E)  ​650

Question 7

__________ are tetrapods that live on land but typically return to water to reproduce.

Accepted Answer

The answer of __________ are tetrapods that live on land...

Question 8

Four of the following statements about Sinosauropteryx are true. Which statement is false?​

Accepted Answer

A)  ​It was likely flightless. 
B)  ​It was found in China. 
C)  ​It lived more recently than Archaeopteryx. 
D)  ​It was a small dinosaur. 
E)  ​It had short forelimbs. 
A)  ​It was likely flightless. 
B)  ​It was found in China. 
C)  ​It lived more recently than Archaeopteryx. 
D)  ​It was a small dinosaur. 
E)  ​It had short forelimbs.

Question 9

What are the bird-like and reptile-like features of Archaeopteryx?

Accepted Answer

​Like a bird, Archaeopteryx ha

Question 10

Four of the following statements are typically true of placoderms. Which one is the exception?​

Accepted Answer

A)  ​They gave birth to live young. 
B)  ​They had jaws. 
C)  ​They had teeth. 
D)  ​They had paired pelvic fins. 
E)  ​They had paired pectoral fins. 
A)  ​They gave birth to live young. 
B)  ​They had jaws. 
C)  ​They had teeth. 
D)  ​They had paired pelvic fins. 
E)  ​They had paired pectoral fins.

Question 11

Choose the one most appropriate letter for each.
-birds

Accepted Answer

A) ​cartilaginous skeleton; jaws 
B) ​reptile with four-chambered heart 
C) ​placental mammal 
D) ​legless amphibian 
E) ​invertebrate chordate; no metamorphosis
F)​endotherm with feathers
G)​limbless reptile
H)​most primitive fishes with jaws; extinct
I)​modern-day parasitic jawless vertebrate
J)​marsupial
K)​adult is called "sea squirt"
L)​egg-laying mammal
M)​swim bladder for buoyancy
N)​may be sexually mature in larval form 
A) ​cartilaginous skeleton; jaws 
B) ​reptile with four-chambered heart 
C) ​placental mammal 
D) ​legless amphibian 
E) ​invertebrate chordate; no metamorphosis
F)​endotherm with feathers
G)​limbless reptile
H)​most primitive fishes with jaws; extinct
I)​modern-day parasitic jawless vertebrate
J)​marsupial
K)​adult is called "sea squirt"
L)​egg-laying mammal
M)​swim bladder for buoyancy
N)​may be sexually mature in larval form

Question 12

Choose the one most appropriate letter for each.
-lampreys

Accepted Answer

A) ​cartilaginous skeleton; jaws 
B) ​reptile with four-chambered heart 
C) ​placental mammal 
D) ​legless amphibian 
E) ​invertebrate chordate; no metamorphosis
F)​endotherm with feathers
G)​limbless reptile
H)​most primitive fishes with jaws; extinct
I)​modern-day parasitic jawless vertebrate
J)​marsupial
K)​adult is called "sea squirt"
L)​egg-laying mammal
M)​swim bladder for buoyancy
N)​may be sexually mature in larval form 
A) ​cartilaginous skeleton; jaws 
B) ​reptile with four-chambered heart 
C) ​placental mammal 
D) ​legless amphibian 
E) ​invertebrate chordate; no metamorphosis
F)​endotherm with feathers
G)​limbless reptile
H)​most primitive fishes with jaws; extinct
I)​modern-day parasitic jawless vertebrate
J)​marsupial
K)​adult is called "sea squirt"
L)​egg-laying mammal
M)​swim bladder for buoyancy
N)​may be sexually mature in larval form

Question 13

Many amphibians now face extinction, and one cause is believed to be a(n) __________ fungus.

Accepted Answer

The answer of Many amphibians now face extinction, and one...

Question 14

Amniotes differ from earlier vertebrates by ____.

Accepted Answer

A)  ​their large size 
B)  ​their three-chambered heart 
C)  ​producing eggs in which the young can develop away from water 
D)  ​the possession of a slimy skin 
E)  ​having external scales 
A)  ​their large size 
B)  ​their three-chambered heart 
C)  ​producing eggs in which the young can develop away from water 
D)  ​the possession of a slimy skin 
E)  ​having external scales

Question 15

Declining amphibian populations are correlated with four of the following. Which one is the exception?

Accepted Answer

A)  ​habitat loss 
B)  ​introduction of new species 
C)  ​long-term changes in climate 
D)  ​evolutionary changes in amphibians 
E)  ​fungal infections and parasitic diseases 
A)  ​habitat loss 
B)  ​introduction of new species 
C)  ​long-term changes in climate 
D)  ​evolutionary changes in amphibians 
E)  ​fungal infections and parasitic diseases

Question 16

Four of the following statements about snakes are true. Which statement is false?​

Accepted Answer

A)  ​All snakes are carnivores. 
B)  ​All snakes use internal fertilization. 
C)  ​All snakes are venomous. 
D)  ​All snakes have flexible skull bones and hinged jaws. 
E)  ​Some snakes retain skeletal remnants of hind limbs. 
A)  ​All snakes are carnivores. 
B)  ​All snakes use internal fertilization. 
C)  ​All snakes are venomous. 
D)  ​All snakes have flexible skull bones and hinged jaws. 
E)  ​Some snakes retain skeletal remnants of hind limbs.

Question 17

Invertebrate chordates include __________ and __________, both marine filter-feeders.

Accepted Answer

​tunicates

Question 18

The most diverse group of placental mammals are the ____.

Accepted Answer

A)  ​bats 
B)  ​carnivores 
C)  ​rodents 
D)  ​moles and shrews 
E)  ​whales and dolphins 
A)  ​bats 
B)  ​carnivores 
C)  ​rodents 
D)  ​moles and shrews 
E)  ​whales and dolphins

Question 19

Choose the one most appropriate letter for each.
-crocodile

Accepted Answer

A) ​cartilaginous skeleton; jaws 
B) ​reptile with four-chambered heart 
C) ​placental mammal 
D) ​legless amphibian 
E) ​invertebrate chordate; no metamorphosis
F)​endotherm with feathers
G)​limbless reptile
H)​most primitive fishes with jaws; extinct
I)​modern-day parasitic jawless vertebrate
J)​marsupial
K)​adult is called "sea squirt"
L)​egg-laying mammal
M)​swim bladder for buoyancy
N)​may be sexually mature in larval form 
A) ​cartilaginous skeleton; jaws 
B) ​reptile with four-chambered heart 
C) ​placental mammal 
D) ​legless amphibian 
E) ​invertebrate chordate; no metamorphosis
F)​endotherm with feathers
G)​limbless reptile
H)​most primitive fishes with jaws; extinct
I)​modern-day parasitic jawless vertebrate
J)​marsupial
K)​adult is called "sea squirt"
L)​egg-laying mammal
M)​swim bladder for buoyancy
N)​may be sexually mature in larval form

Question 20

Which of the following is most closely related to the lobe-finned fishes?

Accepted Answer

A)  ray-finned fishes​ 
B)  ​tunicates 
C)  ​mammals 
D)  ​cartilaginous fishes 
E)  ​lancelets 
A)  ray-finned fishes​ 
B)  ​tunicates 
C)  ​mammals 
D)  ​cartilaginous fishes 
E)  ​lancelets

Exam 25: Animal Evolution - the Chordates

Mammals appeared 220 million years ago but did not begin to greatly diversify until 65 million years ago. Why is this?

Choose the one most appropriate letter for each. -caecilians

Use the figure above to answer questions -The letter "D" in the accompanying figure represents which teeth?​

Most amphibians are completely dependent on an aquatic environment for ____.

Birds and crocodiles share which of the following characteristics?​

The first jawless fishes evolved by about ____ million years ago.

__________ are tetrapods that live on land but typically return to water to reproduce.

Four of the following statements about Sinosauropteryx are true. Which statement is false?​

What are the bird-like and reptile-like features of Archaeopteryx?

Four of the following statements are typically true of placoderms. Which one is the exception?​

Choose the one most appropriate letter for each. -birds

Choose the one most appropriate letter for each. -lampreys

Many amphibians now face extinction, and one cause is believed to be a(n) __________ fungus.

Amniotes differ from earlier vertebrates by ____.

Declining amphibian populations are correlated with four of the following. Which one is the exception?

Four of the following statements about snakes are true. Which statement is false?​

Invertebrate chordates include __________ and __________, both marine filter-feeders.

The most diverse group of placental mammals are the ____.

Choose the one most appropriate letter for each. -crocodile

Which of the following is most closely related to the lobe-finned fishes?

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

Ground Rules of Metabolism

Where It Starts - Photosynthesis

How Cells Release Chemical Energy

Dna Structure and Function

From Dna to Protein

Gene Control

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Studying and Manipulating Genomes

Evidence of Evolution

Processes of Evolution

Organizating Information About Species

Lifes Origin and Early Evolution

Viruses - Bacteria - and Archaea

Protists - the Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolution - the Invertibrates

Human Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Communication Strategies in Plants

Animal Tissues

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Filters

Use the figure above to answer questions -The letter "D" in the accompanying figure represents which teeth?

Birds and crocodiles share which of the following characteristics?

Four of the following statements about Sinosauropteryx are true. Which statement is false?

Four of the following statements are typically true of placoderms. Which one is the exception?

Four of the following statements about snakes are true. Which statement is false?

Invertebrate chordates include and , both marine filter-feeders.