G6 3Q SCI Invertebrates P2

What is the largest group of invertebrates, accounting for over 80% of all known animal species?

• Echinoderms

• Vertebrates

• Arthropods

• Mollusks

Which subphylum do insects belong to?

• Hexapoda

• Arthropoda

• Echinodermata

• Mollusca

What is the exoskeleton of arthropods made of?

• Silica

• Keratin

• Calcium carbonate

• Chitin

Name the class of mollusks that includes snails, slugs, and nudibranchs.

• Bivalvia

• Arachnida

• Gastropoda

• Cephalopoda

What is the name of the phylum that includes earthworms and leeches?

• Annelida

• Echinodermata

• Arthropoda

• Mollusca

Which echinoderm is known for its five-point radial symmetry?

• Sea urchin

• Sea star or starfish

• Jellyfish

• Sand dollar

What is the stinging structure found in cnidarians called?

• stingocyst

• tentaculocyst

• nematocyst

• poisonous sac

Name the largest class of cnidarians.

• Hydrozoa

• Scyphozoa

• Anthozoa

• Cubozoa

What is the process called in which arthropods shed their exoskeleton to grow?

• Exoskeletonizing

• Shedding

• Molting

• Growing

Which mollusk is known for its ability to produce pearls?

• Squid

• Oysters

• Clams

• Starfish