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WorksheetsDeuterostome Animals
Total questions: 10
Worksheet time: 5mins
The water-vascular system found in echinoderms is used primarily for
circulation
excretion of excess water
respiration
locomotion and feeding
Which of the following is not true?
All chordates have notochords
All chordates are vertebrates
All chordates have dorsal hollow nerve cords
All chordates have pharyngeal gill slits
Which of the following are the most abundant and diverse of the extant vertebrates?
ray-finned fishes
birds
mammals
amphibians
Jawless fish are considered vertebrates because they have
a cranium
gills
an endoskeleton of bone
paired appendages
Modified gill arches become ________ in fish.
teeth
jaws
dorsal fins
pectoral fins
Why is the amniotic egg considered an important evolutionary breakthrough?
It allows deposition of eggs in a terrestrial environment.
It provides insulation to conserve heat.
It prolongs embryonic development.
It has a single membrane for gas exchange.
Which group keeps all four chordate characteristics into adulthood?
ray-finned fishes
echinoderms
lancelets
cartilaginous fishes
The term jawless fish could be used to describe
rays
lancelets
lampreys
tunicates
Which two animals display radial symmetry?
sea stars and jellyfish
earthworms and jellyfish
sponges and jellyfish
sea stars and sponges
In vertebrates the dorsal hollow nerve chord develops into
external gills
vertebrae
the spinal chord
muscular tail
