They are larval dragonflies, destined to undergo incomplete metamorphosis.
  • Molting as they grow larger
  • reduced coelom
  • The nematodes lack circular muscle fiber should
  • Concluded about the pond organisms
The antennae of insects have a function most similar to that of _____. A) rhinophoresB) dorsal plummulesC) cerataD) chemoreceptors
  • is a suspension feeder
  • sex organs
  • chelicerae
  • rhino phones
You find a small animal with eight legs crawling up your bedroom wall. Closer examination will probably reveal that this animal has
  • Bristle like structures on tiny apendages
  • Allow the centipede to retain more
  • simple, but not compound, eyes.
  • number of shell plates
A lophotrochozoan
  • Has a crown of ciliated tentacles that function in feeding
  • protostome developmentbilateral symmetrythree embryonic germ layers
  • The centipede had its spiracles open when CO2 packed
  • Allow the centipede to retain more
Allows for identification
  • A mantle
  • mantle
  • A corona
  • Platyhelminth
Nematodes and arthropods both _____.
  • grow by shedding their exoskeleton
  • The nematodes lack circular muscle fiber should
  • The centipede had its spiracles open when CO2 packed
  • A digestive tract
A shared derived characteristic for members of the arthropod subgroup that includes spiders would be the presence of
  • crustaceans
  • gas tripod
  • chelicerae
  • sex organs
More closely related to a flatworm than a roundworm?
  • It has no coelom
  • A corona
  • is a suspension feeder
  • gastropods
Among the invertebrate phyla, phylum Arthropoda is unique in possessing members that have
  • bivalves
  • wings
  • mantle
  • sex organs
What would this imply about protostome evolution
  • mantle
  • 1 and 2
  • The centipede had its spiracles open when CO2 packed
  • thorax
The possession of two pairs of antennae is a characteristic of
  • crustaceans
  • is a suspension feeder
  • cerata
  • reduced coelom
The presence of a lophophore in a newly discovered species would suggest that the species
  • is a suspension feeder
  • number of shell plates
  • dorsal plummules
  • rhino phones
What hypothesis could you make?
  • Poisonous fangs
  • Bristle like structures on tiny apendages
  • C morsitqns live in drier habitat
  • The centipede had its spiracles open when CO2 packed
She should find
  • bivalves
  • Gills
  • A circulatory system
  • Open circulatory system
Closing spiracles would
  • Platyhelminth
  • A digestive tract
  • Allow the centipede to retain more
  • grow by shedding their exoskeleton
Adaptations to terrestrial environments evolved independently in arthropods, mollusks, nematodes, and annelids. What logical conclusion would you make from this statement?
  • Division of these two groups occurred after the protostome developmental sequence appeared.
  • protostome developmentbilateral symmetrythree embryonic germ layers
  • The common ancestor of all these groups was probably aquatic.
  • Has a crown of ciliated tentacles that function in feeding
Which one of these mollusk groups can be classified as suspension feeders?
  • wings
  • mantle
  • gastropods
  • bivalves
If a lung was found in a mollusk, where would it be located?
  • gas tripod
  • reduced coelom
  • Molting as they grow larger
  • Mantle cavity
Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that
  • arthropods have had more time to coevolve with land plants than have vertebrates
  • Division of these two groups occurred after the protostome developmental sequence appeared.
  • chelicerae
  • The common ancestor of all these groups was probably aquatic.
On which body segment are arthropod wings attached?
  • thorax
  • cerata
  • A corona
  • gastropods
Which one of the following is a lophotrochozoan?
  • Poisonous fangs
  • Smelling
  • mollusks
  • gastropods
The body cavity type for arthropods and mollusk can best be described as
  • reduced coelom
  • Mantle cavity
  • dorsal plummules
  • gas tripod
A terrestrial animal species is discovered with larval characteristics
  • bivalves
  • gas tripod
  • A circulatory system
  • Open circulatory system
Would have trouble
  • Poisonous fangs
  • Platyhelminth
  • 2,3,4,5
  • Smelling
The common ancestor of the protostomes had a coelom. What does this suggest?
  • arthropods have had more time to coevolve with land plants than have vertebrates
  • The body cavity evolved before the lophophore.
  • The centipede had its spiracles open when CO2 packed
  • Molting as they grow larger
The protostome developmental sequence arose just once in evolutionary history, resulting in two main subgroups: Lophotrochozoa and Ecdysozoa. What does this finding suggest?
  • Division of these two groups occurred after the protostome developmental sequence appeared.
  • The common ancestor of all these groups was probably aquatic.
  • arthropods have had more time to coevolve with land plants than have vertebrates
  • The body cavity evolved before the lophophore.
What is the best interpretation about the graph?
  • protostome developmentbilateral symmetrythree embryonic germ layers
  • 1 and 2
  • The nematodes lack circular muscle fiber should
  • The centipede had its spiracles open when CO2 packed
What else would u observe about this organism?
  • 1 and 2
  • mollusks
  • A mantle
  • A corona
What would be the best anatomical feature to look for to distinguish a gastropod from a chiton?
  • reduced coelom
  • number of shell plates
  • It has no coelom
  • 1 and 2
Nematoda
  • grow by shedding their exoskeleton
  • Open circulatory system
  • A digestive tract
  • A circulatory system
What anatomical features explain this movement?
  • The common ancestor of all these groups was probably aquatic.
  • 1 and 2
  • protostome developmentbilateral symmetrythree embryonic germ layers
  • The nematodes lack circular muscle fiber should
Which make this distinction
  • A digestive tract
  • Smelling
  • gastropods
  • Poisonous fangs
A terrestrial mollusk without a shell belongs to which clade?
  • crustaceans
  • Mantle cavity
  • gas tripod
  • gastropods
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