ZOOLOGY QUIZ QUESTIONS WITH
VERIFIED ANSWERS
Be able to identify the following structures on the hydroid colony of an Obelia;
hydrorhiza, hydrocauli, coenosarc, perisarc, hydranth, hydratheca and gonangium.
(hydranth) - Answer-Feeding polyp.
Be able to identify the following structures on the hydroid colony of an Obelia;
hydrorhiza, hydrocauli, coenosarc, perisarc, hydranth, hydratheca and gonangium.
(gonangium) - Answer-Reproductive polyp.
What is the main function of the hydranth? - Answer-Capture and ingest prey
What is another name for the hydranth? - Answer-Mouth-feeding polyp.
What is the function of the gonangium? - Answer-Strictly asexual reproductive
polyps.
Be able to identify the following structures on the Gonionemus; exumbrella,
subumbrella, adhesive pads, velum, manubrium, radial canals, gonads and
statocyst. - Answer-
What is the function of the statocyst? - Answer-Specialized cell that keeps
equilibrium.
To which order and genus does the Portuguese man-of-war belong? - Answer-Order
Siphonophora
Genus pysalia
Be able to identify and describe the function of the following structures found in the
Portuguese man-of-war; pneumatophore, gastrozoid, dactylozooids and gonophores.
- Answer-Pneumatophore- Gas bladder for floating
Gastrozooid- digestion polyp, mouth.
Dactylzooids- fishing polyp. Capture fish.
To which Class do the true jellyfish belong? - Answer-Schyphozoa
What is so unique about the jellyfish Cyanea capillata? - Answer-Largest jellyfish (1
ton)
Not deadly, eats plankton
What are the general characteristics of the mesoglea of the common jellyfish? -
Answer-Thick mesoglea often containing amoeboid cells (collenchyma)
Be able to identify and explain the function of the following structures of the common
jellyfish Aurelia; lappets, rhopalium, oral arms, gastric pouches, gonads, gastric
filaments and manubrium. - Answer-
, What are the general characteristics of the Class Cubozoa? - Answer-Most are
dimorphic but polyp for is small and barely noticeable.
Medusa is cube shape and usually small (2-3cm).
Base of each tentacle is flattened (pedalium).
Which of the cubozoan jellyfish is considered to be of extreme importance and why?
- Answer-Chironex fleckeri (sea wasp)- most lethal and small. 20 min and prob live
Which class of cnidarians is also called flower animals? - Answer-Clas Anthozoa
What are the general characteristics of this class? - Answer-No medusa stage-
monomorphic
All are marine.
Gastrovascular cavity divided into chambers by septa or mesenteries.
List the three different subclasses of the "flower animals". (Zoantharia) - Answer-
Hexacorallia= septa arranged in multiples of six (hexamerous)
Stony or true corals.
Exoskeleton- Sclerosepta secreted below the living tissue.
May be solitary or colonial
List the three different subclasses of the "flower animals". (Ceriantipatharia) -
Answer-Tube, anenomes. Thorny corals.
Also hexamerous (body plan multiple of 6).
Solitary. No colonies.
Warm water, Black Coral
List the three different subclasses of the "flower animals". (Alcyonaria) - Answer-
Octocorallia- body plan in multiples of 8 (octomerous).
Soft or horny corals.
All are colonial. Salt water.
Contain solenia which are tubes of gastrovascular cavity that intercommunicate
between individuals of a colony
Endoskeleton
What are the main differences between these subclasses? - Answer-
Be able to identify the following structures of Metridium dianthus; oral disc,mouth,
pharynx, siphonoglyph, complete(primary) septa, incomplete (secondary) septa,
septal filaments and acontia threads - Answer-
What is another name for the mesoglea within the anthozoans? - Answer-
Parenchyma
Describe some of the symbiotic relationships of the sea anemone. - Answer-Alga.
Mutualism. Algae is safe, the anemone is nourished. Clownfish, hermit crab.
Explain, in detail, the difference between Zoantharian and Alcyonarian corals. Give
an example for each of these types of corals. (Zoantharian) - Answer-Sea anemone.
True coral. Multiples of 6. Exoskeleton. It is solitary, colonial.
VERIFIED ANSWERS
Be able to identify the following structures on the hydroid colony of an Obelia;
hydrorhiza, hydrocauli, coenosarc, perisarc, hydranth, hydratheca and gonangium.
(hydranth) - Answer-Feeding polyp.
Be able to identify the following structures on the hydroid colony of an Obelia;
hydrorhiza, hydrocauli, coenosarc, perisarc, hydranth, hydratheca and gonangium.
(gonangium) - Answer-Reproductive polyp.
What is the main function of the hydranth? - Answer-Capture and ingest prey
What is another name for the hydranth? - Answer-Mouth-feeding polyp.
What is the function of the gonangium? - Answer-Strictly asexual reproductive
polyps.
Be able to identify the following structures on the Gonionemus; exumbrella,
subumbrella, adhesive pads, velum, manubrium, radial canals, gonads and
statocyst. - Answer-
What is the function of the statocyst? - Answer-Specialized cell that keeps
equilibrium.
To which order and genus does the Portuguese man-of-war belong? - Answer-Order
Siphonophora
Genus pysalia
Be able to identify and describe the function of the following structures found in the
Portuguese man-of-war; pneumatophore, gastrozoid, dactylozooids and gonophores.
- Answer-Pneumatophore- Gas bladder for floating
Gastrozooid- digestion polyp, mouth.
Dactylzooids- fishing polyp. Capture fish.
To which Class do the true jellyfish belong? - Answer-Schyphozoa
What is so unique about the jellyfish Cyanea capillata? - Answer-Largest jellyfish (1
ton)
Not deadly, eats plankton
What are the general characteristics of the mesoglea of the common jellyfish? -
Answer-Thick mesoglea often containing amoeboid cells (collenchyma)
Be able to identify and explain the function of the following structures of the common
jellyfish Aurelia; lappets, rhopalium, oral arms, gastric pouches, gonads, gastric
filaments and manubrium. - Answer-
, What are the general characteristics of the Class Cubozoa? - Answer-Most are
dimorphic but polyp for is small and barely noticeable.
Medusa is cube shape and usually small (2-3cm).
Base of each tentacle is flattened (pedalium).
Which of the cubozoan jellyfish is considered to be of extreme importance and why?
- Answer-Chironex fleckeri (sea wasp)- most lethal and small. 20 min and prob live
Which class of cnidarians is also called flower animals? - Answer-Clas Anthozoa
What are the general characteristics of this class? - Answer-No medusa stage-
monomorphic
All are marine.
Gastrovascular cavity divided into chambers by septa or mesenteries.
List the three different subclasses of the "flower animals". (Zoantharia) - Answer-
Hexacorallia= septa arranged in multiples of six (hexamerous)
Stony or true corals.
Exoskeleton- Sclerosepta secreted below the living tissue.
May be solitary or colonial
List the three different subclasses of the "flower animals". (Ceriantipatharia) -
Answer-Tube, anenomes. Thorny corals.
Also hexamerous (body plan multiple of 6).
Solitary. No colonies.
Warm water, Black Coral
List the three different subclasses of the "flower animals". (Alcyonaria) - Answer-
Octocorallia- body plan in multiples of 8 (octomerous).
Soft or horny corals.
All are colonial. Salt water.
Contain solenia which are tubes of gastrovascular cavity that intercommunicate
between individuals of a colony
Endoskeleton
What are the main differences between these subclasses? - Answer-
Be able to identify the following structures of Metridium dianthus; oral disc,mouth,
pharynx, siphonoglyph, complete(primary) septa, incomplete (secondary) septa,
septal filaments and acontia threads - Answer-
What is another name for the mesoglea within the anthozoans? - Answer-
Parenchyma
Describe some of the symbiotic relationships of the sea anemone. - Answer-Alga.
Mutualism. Algae is safe, the anemone is nourished. Clownfish, hermit crab.
Explain, in detail, the difference between Zoantharian and Alcyonarian corals. Give
an example for each of these types of corals. (Zoantharian) - Answer-Sea anemone.
True coral. Multiples of 6. Exoskeleton. It is solitary, colonial.
