BIOLOGY 156 EXAM 5 ACTUAL QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT | UPDATED
2025
multicellular, heterotrophs, no cell walls, movement (in most) - ANSWER
kingdom animalia
symmetry- radial, bilateral (cephalization, greater mobility) - ANSWER
symmetry
parazoa, eumetazoa - ANSWER tissues in animals
sponges; lack tissues/ organs - ANSWER parazoa
well-defined tissues, diploblastic, triploblastic - ANSWER Eumetazoa
has ectoderm, mesoderm, endoderm - ANSWER body cavity
no body cavity - ANSWER acoelomates
body cavity between mesoderm/endoderm - ANSWER pseudocoelomates
, body cavity within mesoderm open/closed circulatory system - ANSWER
coelomates
mouth first from blastopore, spiral cleavage, determinate, forms directly from
mesoderm - ANSWER protosomes
molting (exoskeleton) arthropods, nematodes - ANSWER Ecdysozoa
Lophotrochozoa and Platyzoa - ANSWER Spiralia
flat worms, no circulatory/ respiratory systems, complex reproductive system,
marine, freshwater, terrestrial planarians, parasitic flukes, tapeworms -
ANSWER playtzoans
trocophore (free-living larva), lophophore (harsh-shaped crown of ciliated
tentacles surrounding mouth for filter feeding) - ANSWER Lophotrochozoans
anus first from blastopore; radial cleavage, indeterminate, forms indirectly from
archenteron; chordates, echinoderms - ANSWER Deuterostomes
organ systems, efficient, flexible - ANSWER evolution of segmentation
no tissues, parazoa, no symmetry, complex multicellularity, dedifferentiate and
dedifferentiate (sponges) - ANSWER Porifera
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT | UPDATED
2025
multicellular, heterotrophs, no cell walls, movement (in most) - ANSWER
kingdom animalia
symmetry- radial, bilateral (cephalization, greater mobility) - ANSWER
symmetry
parazoa, eumetazoa - ANSWER tissues in animals
sponges; lack tissues/ organs - ANSWER parazoa
well-defined tissues, diploblastic, triploblastic - ANSWER Eumetazoa
has ectoderm, mesoderm, endoderm - ANSWER body cavity
no body cavity - ANSWER acoelomates
body cavity between mesoderm/endoderm - ANSWER pseudocoelomates
, body cavity within mesoderm open/closed circulatory system - ANSWER
coelomates
mouth first from blastopore, spiral cleavage, determinate, forms directly from
mesoderm - ANSWER protosomes
molting (exoskeleton) arthropods, nematodes - ANSWER Ecdysozoa
Lophotrochozoa and Platyzoa - ANSWER Spiralia
flat worms, no circulatory/ respiratory systems, complex reproductive system,
marine, freshwater, terrestrial planarians, parasitic flukes, tapeworms -
ANSWER playtzoans
trocophore (free-living larva), lophophore (harsh-shaped crown of ciliated
tentacles surrounding mouth for filter feeding) - ANSWER Lophotrochozoans
anus first from blastopore; radial cleavage, indeterminate, forms indirectly from
archenteron; chordates, echinoderms - ANSWER Deuterostomes
organ systems, efficient, flexible - ANSWER evolution of segmentation
no tissues, parazoa, no symmetry, complex multicellularity, dedifferentiate and
dedifferentiate (sponges) - ANSWER Porifera
