ESTUDY
TEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION
|| CHAPTERS 34||FULL COMPLETE||LATEST
### 1) What was the original function of the pharyngeal slits in chordates?
A) Opening for the digestive system
B) Suspension-feeding devices
C) Parts of the jaw
D) Gill slits for breathing
E) Parts of the inner ear
**✔ Answer: B**
---
### 2) Which of the following statements would most zoologists find least acceptable?
A) Current lancelets are not ancestors, but relatives of vertebrates.
B) Fossils that resemble lancelets first appeared around 530 million years ago.
C) Molecular evidence supports the idea that lancelets are closely related to vertebrates.
D) Current lancelets are the direct ancestors of fish.
E) Lancelets swim in a similar way to fish.
**✔ Answer: D**
---
,ESTUDY
### 3) Which modern chordates are believed to resemble the earliest chordates the most in
appearance?
A) Lancelets
B) Adult tunicates
C) Amphibians
D) Reptiles
E) Cartilaginous fish (chondrichthyans)
**✔ Answer: A**
---
### 4) A newly discovered aquatic chordate closely resembles an ancient form. It has bony armor, no
paired fins, and is a suspension feeder. Which of the following traits would it most likely have?
A) Legs
B) No jaws
C) An egg with an amniotic sac
D) Warm-bloodedness (endothermy)
**✔ Answer: B**
---
### 5) How many of the following statements about craniates are correct?
1. Craniates have more developed heads than non-craniates.
,ESTUDY
2. Gene duplication occurred in craniates, especially in genes related to development.
3. Craniates and vertebrates are the same group.
4. Pharyngeal slits used for gas exchange first appeared in craniates.
5. The two-chambered heart first appeared in early craniates.
A) One of these
B) Two of these
C) Three of these
D) Four of these
E) All five
**✔ Answer: D**
---
### 6) What do craniates have that earlier chordates did not have?
A) Brain
B) Vertebrae
C) A cartilaginous structure around the notochord
D) A partial or complete skull
E) Bone
**✔ Answer: D**
---
, ESTUDY
### 7) How do lampreys differ from hagfish?
A) They do not have jaws.
B) They have a skull.
C) Their pharyngeal clefts become pharyngeal slits.
D) They have a notochord throughout their life.
E) Their notochord is surrounded by cartilage.
**✔ Answer: E**
---
### 8) What was the feeding mode of the extinct conodonts?
A) Eating plants (herbivory)
B) Suspension feeding
C) Predation
D) Filter feeding
E) Absorbing nutrients
**✔ Answer: C**
---
### 9) The earliest known mineralized structures in vertebrates were involved in what function?
A) Reproduction
TEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION
|| CHAPTERS 34||FULL COMPLETE||LATEST
### 1) What was the original function of the pharyngeal slits in chordates?
A) Opening for the digestive system
B) Suspension-feeding devices
C) Parts of the jaw
D) Gill slits for breathing
E) Parts of the inner ear
**✔ Answer: B**
---
### 2) Which of the following statements would most zoologists find least acceptable?
A) Current lancelets are not ancestors, but relatives of vertebrates.
B) Fossils that resemble lancelets first appeared around 530 million years ago.
C) Molecular evidence supports the idea that lancelets are closely related to vertebrates.
D) Current lancelets are the direct ancestors of fish.
E) Lancelets swim in a similar way to fish.
**✔ Answer: D**
---
,ESTUDY
### 3) Which modern chordates are believed to resemble the earliest chordates the most in
appearance?
A) Lancelets
B) Adult tunicates
C) Amphibians
D) Reptiles
E) Cartilaginous fish (chondrichthyans)
**✔ Answer: A**
---
### 4) A newly discovered aquatic chordate closely resembles an ancient form. It has bony armor, no
paired fins, and is a suspension feeder. Which of the following traits would it most likely have?
A) Legs
B) No jaws
C) An egg with an amniotic sac
D) Warm-bloodedness (endothermy)
**✔ Answer: B**
---
### 5) How many of the following statements about craniates are correct?
1. Craniates have more developed heads than non-craniates.
,ESTUDY
2. Gene duplication occurred in craniates, especially in genes related to development.
3. Craniates and vertebrates are the same group.
4. Pharyngeal slits used for gas exchange first appeared in craniates.
5. The two-chambered heart first appeared in early craniates.
A) One of these
B) Two of these
C) Three of these
D) Four of these
E) All five
**✔ Answer: D**
---
### 6) What do craniates have that earlier chordates did not have?
A) Brain
B) Vertebrae
C) A cartilaginous structure around the notochord
D) A partial or complete skull
E) Bone
**✔ Answer: D**
---
, ESTUDY
### 7) How do lampreys differ from hagfish?
A) They do not have jaws.
B) They have a skull.
C) Their pharyngeal clefts become pharyngeal slits.
D) They have a notochord throughout their life.
E) Their notochord is surrounded by cartilage.
**✔ Answer: E**
---
### 8) What was the feeding mode of the extinct conodonts?
A) Eating plants (herbivory)
B) Suspension feeding
C) Predation
D) Filter feeding
E) Absorbing nutrients
**✔ Answer: C**
---
### 9) The earliest known mineralized structures in vertebrates were involved in what function?
A) Reproduction
