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Exam (elaborations)

bio 322 final Questions And Answers

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  • BIO 322
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  • BIO 322

Phylum Arthropoda (specifics) ~ - tagmosis: fusion of metameric body plan into functional units - growth by molding termed ecdysis - functional cilia absent (except sperm in some) - cuticle forms a rigid exoskeleton Class Hexapoda (specifics) ~ - ph. Arthropoda, sub uniramia - speciali...

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  • August 7, 2024
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  • BIO 322
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bio 322 final Questions And
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Phylum Arthropoda (generic)


✓~ - well dvlp nervous system (tricerebrum)

- bilateral sym, triploblastic, coelomate


- body segmented internally and externally (joint appendages)


- open circulatory system: hemocoel (blood can leave vessels and go back in)


- gut complete, well dvlp


- usually pair of compound eyes (ommatidia)




Subphylum Trilobitomorpha


✓~ - marine arthropods; extinct

- body made of distinct head (cephalon)


-- fused to the posterior portion of the body (pygidium)


- head bears antennae


- 2 well dvlp eyes (look compound based on fossils)

,- 4 pairs of appendages




Subphylum Uniramia (morph)


✓~ - ph. arthro.

- body composed of 3 tagmata


- all appendages multi articulated and uniramous


- head w/ antennae, mandibles, and various numbers of feeding appendages


- mandibles are whole limb jaws w a single biting surface


- compound eyes w ocelli in most




Subphylum Uniramia (systems)


✓~ - gas exchange by tracheal system with spiracles (openings in body that let gases

in/out)

- Malpighian tubules for excretion


- dioecious




Subclass Chilopoda

, ✓~ - ph. arthro, sub uniramia, class myriapoda

- centipedes


- 1 leg per somite; 15-174 pairs


- poison claws


- predaceous (active predators)




Subclass diplopoda


✓~ - ph. arthro, sub uniramia, class myriapoda

- millipedes


- 2 legs per somite


- produce hydrocyanic acid -- warning coloration common


- slow moving, herbaceous scavengers




Class hexapoda (generic)


✓~ - ph arthro, sub uniramia

- insects


- open circulatory syst

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