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Animal Classification Quiz

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Questions and Answers

What is the main characteristic that distinguishes coelomates from acoelomates?

Presence of scattered mesodermal pouches

Presence of a notochord

Presence of segmented bodies

Presence of a body cavity lined with mesoderm (correct)

Which type of animal possesses a pseudocoelom?

Annelids

Aschelminthes (correct)

Molluscs

Platyhelminthes

What is the term for animals that display external and internal body segmentation?

Pseudocoelomates

Coelomates

Non-segmented animals

Metameric segmentation (correct)

Which group of animals is defined by the presence of a notochord during development?

Chordates Signup and view all the answers

Which of the following is an example of an acoelomate?

Platyhelminthes Signup and view all the answers

What defines a coelomate animal?

Body cavity lined by mesoderm Signup and view all the answers

Which of the following is NOT an example of a coelomate?

Planarians Signup and view all the answers

Which type of body cavity characterizes pseudocoelomates?

Scattered pouches of mesoderm between ectoderm and endoderm Signup and view all the answers

What is the primary characteristic of acoelomates?

Absence of any body cavity Signup and view all the answers

Which animal is a classic example of segmentation observed in coelomates?

Earthworm Signup and view all the answers

What is the primary function of the water transport system in sponges?

For food gathering, respiratory exchange and waste removal Signup and view all the answers

Which statement about sponges is correct?

Sponges are hermaphroditic, possessing both eggs and sperms. Signup and view all the answers

What type of cells line the spongocoel and canals in sponges?

Choanocytes Signup and view all the answers

What distinguishes the larval stage of sponges from the adult form?

It is morphologically distinct from the adult. Signup and view all the answers

What materials typically make up the skeleton of sponges?

Spicules or spongin fibers Signup and view all the answers

What unique structures do Cnidaria possess that allow them to capture prey?

Cnidoblasts Signup and view all the answers

Which body form in Coelenterata is characterized as sessile and cylindrical?

Polyp Signup and view all the answers

How do Cnidaria primarily reproduce in their polyp form?

Budding Signup and view all the answers

Which of the following is NOT a characteristic of Cnidaria?

Exclusively freshwater Signup and view all the answers

What is the role of the gastrovascular cavity in Cnidaria?

Digestion and circulation Signup and view all the answers