BIO 322 – 2025 Final Exam
(Graded A+) 100% Correct Answers
Phylum Arthropoda Subphylum’s (4) - Subphylum Trilobitomorph
Subphylum Uniramian
Subphylum Crustacea
Subphylum Chelicerata
Which is the largest phylum in the Animal Kingdom? - Phylum Arthropoda
Phylum Arthropoda has _________ symmetry and _______ development. - bilateral; triploblastic
Arthropods are _______ both internally and externally. - segmented
tagmosis - fusion of segments into functional units
chitin - Polysaccharide found in arthropod exoskeletons (rigid)
Arthropods have ______ appendages. - jointed
ommatidia - compound eyes (phylum Arthropoda)
Arthropods have a ______ body plan. - coelomate
coelomate - body cavity lined by tissue completely derived from mesoderm
Arthropods have a(n) _____ circulatory system where blood flows into ______. - open; sinuses
hemocoel - blood cavity
Arthropods have a ________ and ____-_______ gut. - complete; well-developed
,T/F. Arthropods have functional cilia. - False. Cilia are absent except in sperm in some groups.
What are cilia used as in some arthropods? - neuroreceptors
Some arthropod sperm isn't ______. - mobile
ecdysis - process of moulting
gonochoristic - separate sexes
another term for dioecious used in Phylum Arthropoda
Subphylum Trilobitomorph - Trilobites
T/F. The trilobites are extant. - False. They are extinct.
extant - still in existence
extinct - no longer in existence
The trilobites lived in _______ environments. - marine
pygidium - posterior end
Trilobites had a distinct _____ fused to the _______. - cephalon (head); pygidium
Trilobites had two well-developed ________ ____. - compound eyes
Trilobites had ______ pairs of appendages. - 4
, mortality plate - phenomenon when many organisms fossilize at the same time, typically due to a
catastrophic event
thorax - abdomen
The trilobites were composed of _____ lobes. - 3
Subphylum Uniramian - centipedes, millipedes, insects
Subphylum Uniramian Classes (2) - Class Myrapodia
Class Insecta (Hexapoda)
Uniramians possess ________ to eat. - mandibles
mandibles - whole limb jaws with a single biting surface at the tip
Uniramians have _______ appendages. - multiarticulate
multiarticulate - jointed
Uniramians have a _______ system for gas exchange. - tracheal
Uniramians have a ______ coating the inside of the tracheal system and ________ that lead into the
tracheal system from the outside. - cuticle; spiracles
spiracles - Openings in the exoskeleton leading to gas exchange system
malphighian tubules - main excretory organ in arachnids & insects.
Uniramians have _______ eyes with ______. - compound; ocelli
ocelli - light sensing organs
(Graded A+) 100% Correct Answers
Phylum Arthropoda Subphylum’s (4) - Subphylum Trilobitomorph
Subphylum Uniramian
Subphylum Crustacea
Subphylum Chelicerata
Which is the largest phylum in the Animal Kingdom? - Phylum Arthropoda
Phylum Arthropoda has _________ symmetry and _______ development. - bilateral; triploblastic
Arthropods are _______ both internally and externally. - segmented
tagmosis - fusion of segments into functional units
chitin - Polysaccharide found in arthropod exoskeletons (rigid)
Arthropods have ______ appendages. - jointed
ommatidia - compound eyes (phylum Arthropoda)
Arthropods have a ______ body plan. - coelomate
coelomate - body cavity lined by tissue completely derived from mesoderm
Arthropods have a(n) _____ circulatory system where blood flows into ______. - open; sinuses
hemocoel - blood cavity
Arthropods have a ________ and ____-_______ gut. - complete; well-developed
,T/F. Arthropods have functional cilia. - False. Cilia are absent except in sperm in some groups.
What are cilia used as in some arthropods? - neuroreceptors
Some arthropod sperm isn't ______. - mobile
ecdysis - process of moulting
gonochoristic - separate sexes
another term for dioecious used in Phylum Arthropoda
Subphylum Trilobitomorph - Trilobites
T/F. The trilobites are extant. - False. They are extinct.
extant - still in existence
extinct - no longer in existence
The trilobites lived in _______ environments. - marine
pygidium - posterior end
Trilobites had a distinct _____ fused to the _______. - cephalon (head); pygidium
Trilobites had two well-developed ________ ____. - compound eyes
Trilobites had ______ pairs of appendages. - 4
, mortality plate - phenomenon when many organisms fossilize at the same time, typically due to a
catastrophic event
thorax - abdomen
The trilobites were composed of _____ lobes. - 3
Subphylum Uniramian - centipedes, millipedes, insects
Subphylum Uniramian Classes (2) - Class Myrapodia
Class Insecta (Hexapoda)
Uniramians possess ________ to eat. - mandibles
mandibles - whole limb jaws with a single biting surface at the tip
Uniramians have _______ appendages. - multiarticulate
multiarticulate - jointed
Uniramians have a _______ system for gas exchange. - tracheal
Uniramians have a ______ coating the inside of the tracheal system and ________ that lead into the
tracheal system from the outside. - cuticle; spiracles
spiracles - Openings in the exoskeleton leading to gas exchange system
malphighian tubules - main excretory organ in arachnids & insects.
Uniramians have _______ eyes with ______. - compound; ocelli
ocelli - light sensing organs
