BIOL 3100 (Zoology) Exam 2
Questions with Accurate Answers
Which Phylum was the first to exhibit metamerism? - ANSWERSAnnelida
In the Phylum Annelida, bodies are divided into segments called _____ separated by
______ and are externally marked by circular rings called _____. -
ANSWERSmetameres, septa, annuli
What type of cleavage do Annelida have? - ANSWERSspiral mosaic and determinate
Annelida have a true coelom that is split into _______, each of which is lined by a layer
of mesodermal epithelium called ______. - ANSWERScoelomic compartments,
peritoneum
In Annelida, except ________, the coelom is filled with ____ and serves as a
__________. - ANSWERSHirudinea (leeches), fluid, hydrostatic skeleton
Describe movement in Annelida. - ANSWERSAlternating waves of contraction by
longitudinal and circular muscles along the body; peristalsis
Which Phylum displays the first closed circulatory system? - ANSWERSAnnelida
Identify 7 components of the Annelida digestive system. - ANSWERSmouth, muscular
pharynx, esophagus, crop, muscular gizzard, intestine, anus
Identify the 3 classes of Annelida covered in class. - ANSWERS1. Polychaeta
2. Oligochaeta
3. Hirudinea
In the Phylum Annelida, flaps called ______ are often found on each segment. -
ANSWERSparapodia (parapodium)
A _______ is a ring of secretory cells in the epidermis that appears on the worm's
exterior as a fat band around the body about one-third of the body length from the
anterior end. It is a characteristic of the Class ________. - ANSWERSclitellum,
Oligochaeta
Phylum Annelida, with the exception of Class _______, have tiny chitinous bristles
called _____. - ANSWERSHirudinea, setae
Do Annelida exhibit eutely? - ANSWERSYes
,Identify type of germ layer design in Annelida. - ANSWERSTriploblastic
Phylum Annelida often have a transparent, moist _____ secreted by __________
(hypodermis) and covers the body. - ANSWERScuticle, columnar epithelium
The anus of Annelida is used for _______ of wastes. - ANSWERSelimination
Classes of Annelida are categorized by the presence/absence of ______. -
ANSWERSsetae
Class _____ of Annelida represents the largest and are found mostly in ______
habitats. - ANSWERSPolychaeta, marine
Most members of the Class Polychaeta live in _____ or _____. - ANSWERScrevices,
tubes
Do Polychaeta have differentiated somites (metameres)? - ANSWERSSome, ex Nereis
Poylchaeta often have a _______ that may or may not be retractile, that bears eyes,
tentacles, and sensory palps. It surrounds the mouth and may have _____, ______, or
______ in predatory forms. - ANSWERSProstomium, setae, palps, chitinous jaws
Identify 2 functions of parapodia in Polychaeta. - ANSWERS1. crawling
2. respiratory functions
Identify 3 types/color of respiratory pigments in Polychaeta. - ANSWERS1. hemoglobin
(red)
2. chlorocruorin (blue-green)
3. hemerythrin (red)
How do Polychaeta conduct gas exchange? - ANSWERSparapodia and gills
Which class of Annelida has the most specialized sensory organs? -
ANSWERSPolychaeta
Which class of Annelida may have tentacular crowns? - ANSWERSPolychaeta
What 2 types of organs are responsible for excretion in Polychaeta? - ANSWERS1.
mixed photonephridia/metanephridia - one pair per metamere
2. nephrostome
Phylum Annelida has a nervous system that consists of a ______ that runs the length of
the worm and includes sensory organs such as ___ and ___. - ANSWERSdouble
ventral nerve cord, eyes, statocysts
, Polychaeta are often _______ and lack permanent ______. Fertilization is often _____
and gametes are shed into ____. - ANSWERSdioecious, sex organs, external, coelom
Identify 5 representative Polychaetes (Common Names). - ANSWERS1. Clam worms
2. Scale worms
3. Fire worms
4. Tube worms
5. Fan worms
_______, Genus _______, are Polychaetes that live in mucus-lined burrows near low
tide. - ANSWERSClam worms, Nereis
Genus Nereis is most active at ______ and can tolerate varying _____. -
ANSWERSnight, salinity
________ are members of the family ________ and are some of the most diverse of the
Polychaetes. They have flattened bodies, are covered with scales, and are carnivorous.
- ANSWERSScale worms, Polynoidea
________ are Polychaetes that have hollow, brittle setae that contain poison. -
ANSWERSFireworms
________ are Polychaetes that live in burrows lined with mucus and use cilia and
mucus to obtain food. - ANSWERSTube worms
________ are Polychaetes that have tentacular crowns. - ANSWERS
What is a distinguishing characteristic of Oligochaetes? - ANSWERSpermanent
clitellum
Oligochaeta lack _______ that is present in Polychaeta, but do have ______. -
ANSWERSparapodia, setae
In Oligochaetes, _______ is a reproductive structure that is comprised of a ring of
secretory cells in a band around the body and is a permanent feature. -
ANSWERSclitellum
What kind of reproduction do Oligochaetes have? -
ANSWERSmonoecious/hermaphroditic
What Class of Annelida has the most complex digestive system so far? -
ANSWERSOligochaeta
Which phylum is the first to have metanephridia? - ANSWERSAnnelida
Questions with Accurate Answers
Which Phylum was the first to exhibit metamerism? - ANSWERSAnnelida
In the Phylum Annelida, bodies are divided into segments called _____ separated by
______ and are externally marked by circular rings called _____. -
ANSWERSmetameres, septa, annuli
What type of cleavage do Annelida have? - ANSWERSspiral mosaic and determinate
Annelida have a true coelom that is split into _______, each of which is lined by a layer
of mesodermal epithelium called ______. - ANSWERScoelomic compartments,
peritoneum
In Annelida, except ________, the coelom is filled with ____ and serves as a
__________. - ANSWERSHirudinea (leeches), fluid, hydrostatic skeleton
Describe movement in Annelida. - ANSWERSAlternating waves of contraction by
longitudinal and circular muscles along the body; peristalsis
Which Phylum displays the first closed circulatory system? - ANSWERSAnnelida
Identify 7 components of the Annelida digestive system. - ANSWERSmouth, muscular
pharynx, esophagus, crop, muscular gizzard, intestine, anus
Identify the 3 classes of Annelida covered in class. - ANSWERS1. Polychaeta
2. Oligochaeta
3. Hirudinea
In the Phylum Annelida, flaps called ______ are often found on each segment. -
ANSWERSparapodia (parapodium)
A _______ is a ring of secretory cells in the epidermis that appears on the worm's
exterior as a fat band around the body about one-third of the body length from the
anterior end. It is a characteristic of the Class ________. - ANSWERSclitellum,
Oligochaeta
Phylum Annelida, with the exception of Class _______, have tiny chitinous bristles
called _____. - ANSWERSHirudinea, setae
Do Annelida exhibit eutely? - ANSWERSYes
,Identify type of germ layer design in Annelida. - ANSWERSTriploblastic
Phylum Annelida often have a transparent, moist _____ secreted by __________
(hypodermis) and covers the body. - ANSWERScuticle, columnar epithelium
The anus of Annelida is used for _______ of wastes. - ANSWERSelimination
Classes of Annelida are categorized by the presence/absence of ______. -
ANSWERSsetae
Class _____ of Annelida represents the largest and are found mostly in ______
habitats. - ANSWERSPolychaeta, marine
Most members of the Class Polychaeta live in _____ or _____. - ANSWERScrevices,
tubes
Do Polychaeta have differentiated somites (metameres)? - ANSWERSSome, ex Nereis
Poylchaeta often have a _______ that may or may not be retractile, that bears eyes,
tentacles, and sensory palps. It surrounds the mouth and may have _____, ______, or
______ in predatory forms. - ANSWERSProstomium, setae, palps, chitinous jaws
Identify 2 functions of parapodia in Polychaeta. - ANSWERS1. crawling
2. respiratory functions
Identify 3 types/color of respiratory pigments in Polychaeta. - ANSWERS1. hemoglobin
(red)
2. chlorocruorin (blue-green)
3. hemerythrin (red)
How do Polychaeta conduct gas exchange? - ANSWERSparapodia and gills
Which class of Annelida has the most specialized sensory organs? -
ANSWERSPolychaeta
Which class of Annelida may have tentacular crowns? - ANSWERSPolychaeta
What 2 types of organs are responsible for excretion in Polychaeta? - ANSWERS1.
mixed photonephridia/metanephridia - one pair per metamere
2. nephrostome
Phylum Annelida has a nervous system that consists of a ______ that runs the length of
the worm and includes sensory organs such as ___ and ___. - ANSWERSdouble
ventral nerve cord, eyes, statocysts
, Polychaeta are often _______ and lack permanent ______. Fertilization is often _____
and gametes are shed into ____. - ANSWERSdioecious, sex organs, external, coelom
Identify 5 representative Polychaetes (Common Names). - ANSWERS1. Clam worms
2. Scale worms
3. Fire worms
4. Tube worms
5. Fan worms
_______, Genus _______, are Polychaetes that live in mucus-lined burrows near low
tide. - ANSWERSClam worms, Nereis
Genus Nereis is most active at ______ and can tolerate varying _____. -
ANSWERSnight, salinity
________ are members of the family ________ and are some of the most diverse of the
Polychaetes. They have flattened bodies, are covered with scales, and are carnivorous.
- ANSWERSScale worms, Polynoidea
________ are Polychaetes that have hollow, brittle setae that contain poison. -
ANSWERSFireworms
________ are Polychaetes that live in burrows lined with mucus and use cilia and
mucus to obtain food. - ANSWERSTube worms
________ are Polychaetes that have tentacular crowns. - ANSWERS
What is a distinguishing characteristic of Oligochaetes? - ANSWERSpermanent
clitellum
Oligochaeta lack _______ that is present in Polychaeta, but do have ______. -
ANSWERSparapodia, setae
In Oligochaetes, _______ is a reproductive structure that is comprised of a ring of
secretory cells in a band around the body and is a permanent feature. -
ANSWERSclitellum
What kind of reproduction do Oligochaetes have? -
ANSWERSmonoecious/hermaphroditic
What Class of Annelida has the most complex digestive system so far? -
ANSWERSOligochaeta
Which phylum is the first to have metanephridia? - ANSWERSAnnelida
