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 nerv...
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
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