Biology 104 Final Exam with complete
solution
Phylum Chordata consists of what group of animals? -Correct Answer-The Chordates
What is a notochord? -Correct Answer-A flexible dorsal structure with muscles attached to it
It is the first embryonic skeletal part
What is the dorsal tubular nerve chord? -Correct Answer-The "spinal chord"; enlarges on the anterior
side to form brain
The muscular part used for locomotion in aquatic species of chordates -Correct Answer-Post anal tail
Describe the endostyle -Correct Answer-Glandular groove in the pharynx that produces mucus to trap
food
In most vertebrates this is replaced by the thyroid
Originated as a suspension-feeding adaptation and is used for respiration in fishes -Correct Answer-
Pharyngeal gill slits
What is the common name for Sub-Phylum Urochordata? -Correct Answer-Proto-chordates
What is the common name for Sub-Phylum Cephalochordata? -Correct Answer-Tunicates and lancelets
Are tunicates sessile as adults? -Correct Answer-Yes
What is the exterior of a tunicate called? -Correct Answer-The tunic
The vertebrates are members of what sub-phylum? -Correct Answer-Sub-Phylum Vertebrata
, Name some characteristics of vertebrates -Correct Answer-1) Vertebral column
2) Cranium (brain case)
3) Pectoral and pelvic girdles
4) Six classes of fish and four classes of tetrapods
What were known as "jaw-less vertebrates"? -Correct Answer-Ostracoderms
These vertebrates were heavily armored and had jaws -Correct Answer-Placoderms
What ancient species gave rise to modern bony fishes? -Correct Answer-Ancanthodians
What is the common name for Class Myxini? -Correct Answer-Hagfish
What is the common name for Class Cephalospidomorphi? -Correct Answer-Lamprey
What do Class Myxini and Cephalospidomorphi have in common? -Correct Answer-1) Both have
cartilagenous skeleton
2) 2 chambered hearts
3) Gills for respiration
4) Kidney for excretion and osmoregulation
5) Myxini feed on dead/dying prey while Lamprey are considered ecto-parastites
What is the common name for Class Chondrichthyes? -Correct Answer-Cartilage fishes
Name some characteristics of Class Chondrichthyes -Correct Answer-1) Jaws, paired fins, and placoid
scales
2) Skeleton made of cartilage
3) 2 Chambered heart
4) 5-7 gill pairs
solution
Phylum Chordata consists of what group of animals? -Correct Answer-The Chordates
What is a notochord? -Correct Answer-A flexible dorsal structure with muscles attached to it
It is the first embryonic skeletal part
What is the dorsal tubular nerve chord? -Correct Answer-The "spinal chord"; enlarges on the anterior
side to form brain
The muscular part used for locomotion in aquatic species of chordates -Correct Answer-Post anal tail
Describe the endostyle -Correct Answer-Glandular groove in the pharynx that produces mucus to trap
food
In most vertebrates this is replaced by the thyroid
Originated as a suspension-feeding adaptation and is used for respiration in fishes -Correct Answer-
Pharyngeal gill slits
What is the common name for Sub-Phylum Urochordata? -Correct Answer-Proto-chordates
What is the common name for Sub-Phylum Cephalochordata? -Correct Answer-Tunicates and lancelets
Are tunicates sessile as adults? -Correct Answer-Yes
What is the exterior of a tunicate called? -Correct Answer-The tunic
The vertebrates are members of what sub-phylum? -Correct Answer-Sub-Phylum Vertebrata
, Name some characteristics of vertebrates -Correct Answer-1) Vertebral column
2) Cranium (brain case)
3) Pectoral and pelvic girdles
4) Six classes of fish and four classes of tetrapods
What were known as "jaw-less vertebrates"? -Correct Answer-Ostracoderms
These vertebrates were heavily armored and had jaws -Correct Answer-Placoderms
What ancient species gave rise to modern bony fishes? -Correct Answer-Ancanthodians
What is the common name for Class Myxini? -Correct Answer-Hagfish
What is the common name for Class Cephalospidomorphi? -Correct Answer-Lamprey
What do Class Myxini and Cephalospidomorphi have in common? -Correct Answer-1) Both have
cartilagenous skeleton
2) 2 chambered hearts
3) Gills for respiration
4) Kidney for excretion and osmoregulation
5) Myxini feed on dead/dying prey while Lamprey are considered ecto-parastites
What is the common name for Class Chondrichthyes? -Correct Answer-Cartilage fishes
Name some characteristics of Class Chondrichthyes -Correct Answer-1) Jaws, paired fins, and placoid
scales
2) Skeleton made of cartilage
3) 2 Chambered heart
4) 5-7 gill pairs
