Biology 104 Final Exam Questions and
Answers 100% Correct | Graded A+
Phylum Chordata consists of what group of animals? - ✔✔The Chordates
What is a notochord? - ✔✔A flexible dorsal structure with muscles attached
to it
It is the first embryonic skeletal part
What is the dorsal tubular nerve chord? - ✔✔The "spinal chord"; enlarges
on the anterior side to form brain
The muscular part used for locomotion in aquatic species of chordates -
✔✔Post anal tail
Describe the endostyle - ✔✔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 - ✔✔Pharyngeal gill slits
What is the common name for Sub-Phylum Urochordata? - ✔✔Proto-
chordates
, What is the common name for Sub-Phylum Cephalochordata? -
✔✔Tunicates and lancelets
Are tunicates sessile as adults? - ✔✔Yes
What is the exterior of a tunicate called? - ✔✔The tunic
The vertebrates are members of what sub-phylum? - ✔✔Sub-Phylum
Vertebrata
Name some characteristics of vertebrates - ✔✔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"? - ✔✔Ostracoderms
These vertebrates were heavily armored and had jaws - ✔✔Placoderms
What ancient species gave rise to modern bony fishes? -
✔✔Ancanthodians
What is the common name for Class Myxini? - ✔✔Hagfish
What is the common name for Class Cephalospidomorphi? - ✔✔Lamprey
What do Class Myxini and Cephalospidomorphi have in common? - ✔✔1)
Both have cartilagenous skeleton
Answers 100% Correct | Graded A+
Phylum Chordata consists of what group of animals? - ✔✔The Chordates
What is a notochord? - ✔✔A flexible dorsal structure with muscles attached
to it
It is the first embryonic skeletal part
What is the dorsal tubular nerve chord? - ✔✔The "spinal chord"; enlarges
on the anterior side to form brain
The muscular part used for locomotion in aquatic species of chordates -
✔✔Post anal tail
Describe the endostyle - ✔✔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 - ✔✔Pharyngeal gill slits
What is the common name for Sub-Phylum Urochordata? - ✔✔Proto-
chordates
, What is the common name for Sub-Phylum Cephalochordata? -
✔✔Tunicates and lancelets
Are tunicates sessile as adults? - ✔✔Yes
What is the exterior of a tunicate called? - ✔✔The tunic
The vertebrates are members of what sub-phylum? - ✔✔Sub-Phylum
Vertebrata
Name some characteristics of vertebrates - ✔✔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"? - ✔✔Ostracoderms
These vertebrates were heavily armored and had jaws - ✔✔Placoderms
What ancient species gave rise to modern bony fishes? -
✔✔Ancanthodians
What is the common name for Class Myxini? - ✔✔Hagfish
What is the common name for Class Cephalospidomorphi? - ✔✔Lamprey
What do Class Myxini and Cephalospidomorphi have in common? - ✔✔1)
Both have cartilagenous skeleton
