WSU BIOLOGY 106 EXAM AND FINAL COMPLETE COURSE ACTUAL 220 EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS
Arthropods - correct answer Phyla with greatest amount of diversity with 85% of animal spp
700 million years ago - correct answer When the first animals originated
Porifera (sponges) - correct answer Phyla with no tissues, muscles, nerves, or specialized organs
Choanocytes - correct answer Flow of water and food acquisition in sponges
Amoebocytes - correct answer Found in sponges, these cells are mobile and perform numerous
functions, including reproduction, transport of food particles to nonfeeding cells, and secretion
of material that forms the spicules
Spicules - correct answer Found in sponges, these consist of inorganic materials and support
the animal
Cnidaria (jellyfish) - correct answer Phyla with 2 tissue layers, contractile muscle and nerve
cells, gastrovascular cavity, and radial symmetry
Metazoa - correct answer multicellular animals
Cambrian Explosion - correct answer Diversity of large animals increased dramatically around
550 million years ago
Three tissue layers - correct answer ectoderm, mesoderm, endoderm
Bilateral symmetry - correct answer Posterior/anterior
left/right senses concentrated in head and direction of movement
Coelom - correct answer Body cavity with space to put organs
Lophotrochozoa - correct answer A phyla group that has feeding and locomotory similarities
Ectoprocta - correct answer Colonial, filter feeders
All cells are identical
Cannot move
Rotifera - correct answer eutely and small phylum (< 3mm)
Filter feeders
Have set number of cells
Cryptobiosis - correct answer To hide life
What occurs when environment changes around rotifera
How rotifera develop - correct answer Individual cells enlarge rather than divide
Annelida - correct answer Segmented worms
, WSU BIOLOGY 106 EXAM AND FINAL COMPLETE COURSE ACTUAL 220 EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS
Hydrostatic skeleton
Hydrostatic skeleton - correct answer skeleton made of fluid-filled body segments that work
with muscles to allow the animal to move
Metanephridia - correct answer Tubes that process metabolic waste in annelidas
Mollusca - correct answer Visceral mass, mantle, and foot
Contain radula
Radula - correct answer An organ covered with teeth that mollusks use to scrape food into their
mouths
Nudibranchs - correct answer Sea slugs
Bivalves - correct answer mollusks that have two shells held together by hinges and strong
muscles (clams)
Cephalopods - correct answer octopus, squid
Platyhelminthes - correct answer Phylum of flatworms
80% are parasitic
Ecdysozoa - correct answer Nematoda and Arthropoda
Nematodes - correct answer Roundworms
cuticle, molt, eutetly, ubiquitous, a few spp parasitic
Abundant in soil and aquatic habitats
Pinworms - correct answer Parasite of the gut
Common in young children
Hookworm - correct answer Parasitic worm that consumes blood
filarial roundworms - correct answer Parasitic worm that causes elephantiasis or destruction of
lymphatic system
Arthropoda - correct answer Phylum where all species have a segmented exoskeleton and
jointed appendages
Insects - correct answer The most numerous kind of species of the arthropod phyla
Tagmatization - correct answer The fusion of segments with specialized f(x) in arthropods
Deuterostomia - correct answer echinoderms and chordates
Contain vertebrates
CORRECT DETAILED ANSWERS
Arthropods - correct answer Phyla with greatest amount of diversity with 85% of animal spp
700 million years ago - correct answer When the first animals originated
Porifera (sponges) - correct answer Phyla with no tissues, muscles, nerves, or specialized organs
Choanocytes - correct answer Flow of water and food acquisition in sponges
Amoebocytes - correct answer Found in sponges, these cells are mobile and perform numerous
functions, including reproduction, transport of food particles to nonfeeding cells, and secretion
of material that forms the spicules
Spicules - correct answer Found in sponges, these consist of inorganic materials and support
the animal
Cnidaria (jellyfish) - correct answer Phyla with 2 tissue layers, contractile muscle and nerve
cells, gastrovascular cavity, and radial symmetry
Metazoa - correct answer multicellular animals
Cambrian Explosion - correct answer Diversity of large animals increased dramatically around
550 million years ago
Three tissue layers - correct answer ectoderm, mesoderm, endoderm
Bilateral symmetry - correct answer Posterior/anterior
left/right senses concentrated in head and direction of movement
Coelom - correct answer Body cavity with space to put organs
Lophotrochozoa - correct answer A phyla group that has feeding and locomotory similarities
Ectoprocta - correct answer Colonial, filter feeders
All cells are identical
Cannot move
Rotifera - correct answer eutely and small phylum (< 3mm)
Filter feeders
Have set number of cells
Cryptobiosis - correct answer To hide life
What occurs when environment changes around rotifera
How rotifera develop - correct answer Individual cells enlarge rather than divide
Annelida - correct answer Segmented worms
, WSU BIOLOGY 106 EXAM AND FINAL COMPLETE COURSE ACTUAL 220 EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS
Hydrostatic skeleton
Hydrostatic skeleton - correct answer skeleton made of fluid-filled body segments that work
with muscles to allow the animal to move
Metanephridia - correct answer Tubes that process metabolic waste in annelidas
Mollusca - correct answer Visceral mass, mantle, and foot
Contain radula
Radula - correct answer An organ covered with teeth that mollusks use to scrape food into their
mouths
Nudibranchs - correct answer Sea slugs
Bivalves - correct answer mollusks that have two shells held together by hinges and strong
muscles (clams)
Cephalopods - correct answer octopus, squid
Platyhelminthes - correct answer Phylum of flatworms
80% are parasitic
Ecdysozoa - correct answer Nematoda and Arthropoda
Nematodes - correct answer Roundworms
cuticle, molt, eutetly, ubiquitous, a few spp parasitic
Abundant in soil and aquatic habitats
Pinworms - correct answer Parasite of the gut
Common in young children
Hookworm - correct answer Parasitic worm that consumes blood
filarial roundworms - correct answer Parasitic worm that causes elephantiasis or destruction of
lymphatic system
Arthropoda - correct answer Phylum where all species have a segmented exoskeleton and
jointed appendages
Insects - correct answer The most numerous kind of species of the arthropod phyla
Tagmatization - correct answer The fusion of segments with specialized f(x) in arthropods
Deuterostomia - correct answer echinoderms and chordates
Contain vertebrates
