GSU BIOLOGY 1104 CERTIFICATION PAPER
2026 FULL SOLUTION GRADED A+
● Phylum Platyhelminthes. Answer: organ level, triploblastic,
aceolomate, bilateral, cephalization, blind sac
● Phylum Nematoda. Answer: pseudocoelomates, tube within tube
● Phylum Rotifera (rotifers). Answer: -pseudocoelomates
-heterotroph
● Phylum Mollusca. Answer: eucoelomate, protostome, muscular foot,
open circulatory
● Phylum annelida. Answer: metamerism, hemoglobin
● Phylum Arthropoda. Answer: striated muscles, exoskeleton with
jointed appendages, ecoelomates
● Phylum Echinodermata. Answer: -eucoelomate
-deuterostomes
-bilateral
, -
● Phylum Cordata. Answer: notocord, post anal cord, gill slits, dorsal
hollow cord
● Subphylum Verbrata. Answer: humans
● Superclass Gnathostomata. Answer: jawed vertebrates
● Class Chondrichthyes. Answer: sharks, skates, rays
● Class Osteichthyes. Answer: bony fish
● Aceolomate/ advantages/ disadvantages. Answer: no body cavity,
-body can be flat to hide
-limited movement/less intricate body
● Pseudocoelomate/ advantages/ disadvantages. Answer: -An animal
whose body cavity is not completely lined by mesoderm
-Freedom of movement/ organ development and specialization
- no specialized control, not compartmentalized
● Eucoelomate/ advantages/ disadvantages. Answer: -true body cavity
2026 FULL SOLUTION GRADED A+
● Phylum Platyhelminthes. Answer: organ level, triploblastic,
aceolomate, bilateral, cephalization, blind sac
● Phylum Nematoda. Answer: pseudocoelomates, tube within tube
● Phylum Rotifera (rotifers). Answer: -pseudocoelomates
-heterotroph
● Phylum Mollusca. Answer: eucoelomate, protostome, muscular foot,
open circulatory
● Phylum annelida. Answer: metamerism, hemoglobin
● Phylum Arthropoda. Answer: striated muscles, exoskeleton with
jointed appendages, ecoelomates
● Phylum Echinodermata. Answer: -eucoelomate
-deuterostomes
-bilateral
, -
● Phylum Cordata. Answer: notocord, post anal cord, gill slits, dorsal
hollow cord
● Subphylum Verbrata. Answer: humans
● Superclass Gnathostomata. Answer: jawed vertebrates
● Class Chondrichthyes. Answer: sharks, skates, rays
● Class Osteichthyes. Answer: bony fish
● Aceolomate/ advantages/ disadvantages. Answer: no body cavity,
-body can be flat to hide
-limited movement/less intricate body
● Pseudocoelomate/ advantages/ disadvantages. Answer: -An animal
whose body cavity is not completely lined by mesoderm
-Freedom of movement/ organ development and specialization
- no specialized control, not compartmentalized
● Eucoelomate/ advantages/ disadvantages. Answer: -true body cavity
