30 Questions
Where do flatworms live?
In marine, freshwater, and damp terrestrial habitats
How do Catenulida, or 'chain worms,' reproduce?
By budding asexually
What is the function of the scolex in a tapeworm?
Anchoring the tapeworm to the host
What is the role of proglottids in tapeworms?
Containing sex organs
Which group lacks a digestive system?
Flatworms
What type of development do flatworms undergo?
Acoelomate development
Which phylum includes snails, slugs, oysters, clams, and octopuses?
Mollusca
What is the characteristic protective feature of most molluscs?
Hard shell
Which class of molluscs includes squids and chambered nautiluses?
Cephalopoda
What is a characteristic feature of errantians in the Annelids phylum?
Pair of parapodia with chaetae
Which invertebrate group is characterized by a tough coat called a cuticle?
Nematodes
In the context of arthropods, what does 'appendage specialization' refer to?
Jointed appendages with specialized functions
What is the function of the jointed appendages in arthropods?
Sensory reception
How do arthropods grow when their exoskeleton becomes too small?
They molt their exoskeleton
What covers the body of arthropods?
Cuticle
Which circulatory system do arthropods have?
Open circulatory system
What is a characteristic of echinoderms that helps in locomotion and feeding?
Hydraulic canals branching into tube feet
Which phylum includes vertebrates like fish, amphibians, reptiles, birds, and mammals?
Chordata
What percentage of known animal species are invertebrates?
More than 95%
Which phylum of animals lacks true tissues and organs?
Porifera
What is the body plan of Cnidarians characterized by?
Radial body plan
What is the function of the spongocoel in sponges?
Capturing food particles
Which phylum contains animals with both sessile and motile forms like jellies and corals?
Cnidaria
What major clades do Bilaterian animals include?
Eumetazoa and Deuterostomia
Which phylum includes animals with a water vascular system and endoskeleton?
Echinodermata
What is a key feature of animals in Phylum Chordata?
Bilateral symmetry
Which group consists of coelomates with lophophores and ciliated tentacles for feeding?
Brachiopoda
Which phylum has animals with a gastrovascular cavity and radial symmetry?
Echinodermata
What is a characteristic of animals in Phylum Porifera?
Choanocytes
Which phylum consists of animals with a muscular foot, visceral mass, and hard shell made of calcium carbonate?
Mollusca
Learn about the characteristics and major classes of Molluscs in the Phylum Mollusca, which includes snails, slugs, oysters, clams, octopuses, and squids. Explore their habitat, body structure, and the different classes they belong to.
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