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Exam (elaborations)

Biology 104 Final Exam with complete solution

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  • Biology 104

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...

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  • August 6, 2024
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  • Biology 104
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Biology 104 Final Exam with complete
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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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