Molluscs Phylum Mollusca Overview

Play an AI-generated podcast conversation about this lesson

Where do flatworms live?

Only in marine habitats

Exclusively in freshwater habitats

Only in terrestrial habitats

In marine, freshwater, and damp terrestrial habitats (correct)

How do Catenulida, or 'chain worms,' reproduce?

Sexually through eggs and sperm

Through a larval stage

By laying eggs in the water

By budding asexually (correct)

What is the function of the scolex in a tapeworm?

Digesting food for the tapeworm

Containing the reproductive structures

Anchoring the tapeworm to the host (correct)

Absorbing nutrients from the host's intestine

What is the role of proglottids in tapeworms?

Containing sex organs Signup and view all the answers

Which group lacks a digestive system?

Flatworms Signup and view all the answers

What type of development do flatworms undergo?

Acoelomate development Signup and view all the answers

Which phylum includes snails, slugs, oysters, clams, and octopuses?

Mollusca Signup and view all the answers

What is the characteristic protective feature of most molluscs?

Hard shell Signup and view all the answers

Which class of molluscs includes squids and chambered nautiluses?

Cephalopoda Signup and view all the answers

What is a characteristic feature of errantians in the Annelids phylum?

Pair of parapodia with chaetae Signup and view all the answers

Which invertebrate group is characterized by a tough coat called a cuticle?

Nematodes Signup and view all the answers

In the context of arthropods, what does 'appendage specialization' refer to?

Jointed appendages with specialized functions Signup and view all the answers

What is the function of the jointed appendages in arthropods?

Sensory reception Signup and view all the answers

How do arthropods grow when their exoskeleton becomes too small?

They molt their exoskeleton Signup and view all the answers

What covers the body of arthropods?

Cuticle Signup and view all the answers

Which circulatory system do arthropods have?

Open circulatory system Signup and view all the answers

What is a characteristic of echinoderms that helps in locomotion and feeding?

Hydraulic canals branching into tube feet Signup and view all the answers

Which phylum includes vertebrates like fish, amphibians, reptiles, birds, and mammals?

Chordata Signup and view all the answers

What percentage of known animal species are invertebrates?

More than 95% Signup and view all the answers

Which phylum of animals lacks true tissues and organs?

Porifera Signup and view all the answers

What is the body plan of Cnidarians characterized by?

Radial body plan Signup and view all the answers

What is the function of the spongocoel in sponges?

Capturing food particles Signup and view all the answers

Which phylum contains animals with both sessile and motile forms like jellies and corals?

Cnidaria Signup and view all the answers

What major clades do Bilaterian animals include?

Eumetazoa and Deuterostomia Signup and view all the answers

Which phylum includes animals with a water vascular system and endoskeleton?

Echinodermata Signup and view all the answers

What is a key feature of animals in Phylum Chordata?

Bilateral symmetry Signup and view all the answers

Which group consists of coelomates with lophophores and ciliated tentacles for feeding?

Brachiopoda Signup and view all the answers

Which phylum has animals with a gastrovascular cavity and radial symmetry?