Zoology Invertebrate

What is the largest group of invertebrates, characterized by jointed legs and a hard exoskeleton?

• Mollusks

• Arthropods

• Cnidarians

• Echinoderms

Which invertebrate group includes animals like octopuses, snails, and clams?

• Arachnids

• Mollusks

• Annelids

• Echinoderms

What type of invertebrates are known for their segmented bodies and setae (bristles)?

• Arthropods (Insecta)

• Mollusks (Gastropoda)

• Echinoderms (Asteroidea)

• Annelids (Polychaeta)

Name the invertebrates that have stinging cells and include animals like jellyfish and corals.

• Cnidarians

• Mollusks

• Echinoderms

• Arthropods

What are flatworms called, known for their flattened bodies and lack of a body cavity?

• Annelida

• Nematoda

• Platyhelminthes

• Mollusca

How many legs do most arthropods have?

• 6

• 4

• 10

• 8

Which mollusk has a single, spiral shell to protect its soft body?

• clam

• oyster

• octopus

• snail

What is the name of the process where arthropods shed their exoskeleton to grow?

• exoskeleton casting

• shedding

• skin peeling

• molting

What is the name of the class of annelids that includes earthworms and leeches?

• Oligochaeta

• Polychaeta

• Gastropoda

• Hirudinea

Which cnidarian has a bell-shaped body and tentacles with stinging cells?

• sea anemone

• coral

• jellyfish

• starfish