BSC 1011 UNIT4 EXAM REVIEW QUESTIONS WITH
VERIFIED ANSWERS
Which phylum is characterized by animals that have a segmented body?
Cnidaria
Platyhelminthes
Arthropoda
Mollusca - Answers - arthropoda
The water vascular system of echinoderms
functions as a circulatory system that distributes nutrients to body cells.
functions in locomotion and feeding.
is bilateral in organization, even though the adult animal is not bilaterally symmetrical.
moves water through the animal's body during filter feeding. - Answers - functions in
locomotion and feeding
You find a multi-legged animal in your garden and want to determine if it is a centipede
or a millipede. You take the animal to a university where a myriapodologist quickly tells
you that you have found a centipede. Which of the following traits may have allowed her
to make this distinction?
Apresence of body segments
poisonous claws
egg-laying
molting - Answers - poisonous claws
All insects ________.
undergo complete metamorphosis and have segmented bodies
have jointed appendages and a radula
have an exoskeleton or cuticle
have jointed appendages and spicules - Answers - have an exoskeleton or cuticle
The heartworms that can accumulate within the hearts of dogs and other mammals
have a pseudocoelom, an alimentary canal, and an outer covering that is occasionally
shed. To which phylum does the heartworm belong?
Platyhelminthes
Arthropoda
Nematoda
Annelida - Answers - nematoda
Which of the following combinations correctly matches a phylum to its description?
Echinodermata—bilateral symmetry as a larva, water vascular system
Nematoda—segmented worms, closed circulatory system
Cnidaria—flatworms, gastrovascular cavity, acoelomate
, Platyhelminthes—radial symmetry, polyp and medusa body forms - Answers -
echinodermata- bilateral symmetry as a larva, water vascular system
Which of the following statements is correct with respect to the evolutionary relationship
between chordates and invertebrates?
1. Chordates are most closely related to arthropods.
2. Chordates evolved from echinoderms.
3. Chordates are more closely related to echinoderms than to arthropods.
4. Chordates are most closely related to the tunicate-type of echinoderms. - Answers -
chordates are more closely related to echinoderms than to arthropods
Some members of the phylum __________________ are unique among bilaterians
because they generate ATP in anaerobic environments through substrate level
phosphorylation in vestigial mitochondria.
1. Loricifera
2. Cycliophora
3. Onychophora
4. Diplomonads
5. Parabasilids - Answers - loricefera
Vertebrates and tunicates share
jaws adapted for feeding.
a high degree of cephalization.
an endoskeleton that includes a skull.
a notochord and a dorsal, hollow nerve cord. - Answers - a notochord and a dorsal,
hollow nerve chord.
Which of the following is a characteristic of all chordates at some point during their life
cycle?
jaws
post-anal tail
four-chambered heart
vertebrae - Answers - post anal tail
If a tunicate's pharyngeal gill slits were suddenly blocked, the animal would have trouble
________.
only respiring
only feeding
moving
respiring and feeding - Answers - respiring and feeding
Chordate pharyngeal slits appear to have functioned first as ________.
the digestive system's opening
suspension-feeding devices
components of the jaw
sites of respiration - Answers - suspension feeding devices
VERIFIED ANSWERS
Which phylum is characterized by animals that have a segmented body?
Cnidaria
Platyhelminthes
Arthropoda
Mollusca - Answers - arthropoda
The water vascular system of echinoderms
functions as a circulatory system that distributes nutrients to body cells.
functions in locomotion and feeding.
is bilateral in organization, even though the adult animal is not bilaterally symmetrical.
moves water through the animal's body during filter feeding. - Answers - functions in
locomotion and feeding
You find a multi-legged animal in your garden and want to determine if it is a centipede
or a millipede. You take the animal to a university where a myriapodologist quickly tells
you that you have found a centipede. Which of the following traits may have allowed her
to make this distinction?
Apresence of body segments
poisonous claws
egg-laying
molting - Answers - poisonous claws
All insects ________.
undergo complete metamorphosis and have segmented bodies
have jointed appendages and a radula
have an exoskeleton or cuticle
have jointed appendages and spicules - Answers - have an exoskeleton or cuticle
The heartworms that can accumulate within the hearts of dogs and other mammals
have a pseudocoelom, an alimentary canal, and an outer covering that is occasionally
shed. To which phylum does the heartworm belong?
Platyhelminthes
Arthropoda
Nematoda
Annelida - Answers - nematoda
Which of the following combinations correctly matches a phylum to its description?
Echinodermata—bilateral symmetry as a larva, water vascular system
Nematoda—segmented worms, closed circulatory system
Cnidaria—flatworms, gastrovascular cavity, acoelomate
, Platyhelminthes—radial symmetry, polyp and medusa body forms - Answers -
echinodermata- bilateral symmetry as a larva, water vascular system
Which of the following statements is correct with respect to the evolutionary relationship
between chordates and invertebrates?
1. Chordates are most closely related to arthropods.
2. Chordates evolved from echinoderms.
3. Chordates are more closely related to echinoderms than to arthropods.
4. Chordates are most closely related to the tunicate-type of echinoderms. - Answers -
chordates are more closely related to echinoderms than to arthropods
Some members of the phylum __________________ are unique among bilaterians
because they generate ATP in anaerobic environments through substrate level
phosphorylation in vestigial mitochondria.
1. Loricifera
2. Cycliophora
3. Onychophora
4. Diplomonads
5. Parabasilids - Answers - loricefera
Vertebrates and tunicates share
jaws adapted for feeding.
a high degree of cephalization.
an endoskeleton that includes a skull.
a notochord and a dorsal, hollow nerve cord. - Answers - a notochord and a dorsal,
hollow nerve chord.
Which of the following is a characteristic of all chordates at some point during their life
cycle?
jaws
post-anal tail
four-chambered heart
vertebrae - Answers - post anal tail
If a tunicate's pharyngeal gill slits were suddenly blocked, the animal would have trouble
________.
only respiring
only feeding
moving
respiring and feeding - Answers - respiring and feeding
Chordate pharyngeal slits appear to have functioned first as ________.
the digestive system's opening
suspension-feeding devices
components of the jaw
sites of respiration - Answers - suspension feeding devices
