Invertebrates Overview Quiz

Study Notes

Major Groups of Invertebrates

Porifera:
- Commonly known as sponges.
- Simple organisms that lack true tissues and organs.
- Mostly marine and known for their porous bodies.
Cnidarians:
- Includes jellyfish, corals, and sea anemones.
- Characterized by radial symmetry and a simple body plan.
- Possess specialized cells called cnidocytes for capturing prey.
Platyhelminthes:
- Known as flatworms.
- Often parasitic (e.g., tapeworms) or free-living (e.g., planarians).
- Have a bilateral symmetry and a flat body structure.
Nematoda:
- Referred to as roundworms.
- Found in diverse environments, including marine, freshwater, and soil habitats.
- Notable for their cylindrical body shape and complete digestive system.
Annelida:
- Commonly called segmented worms.
- Examples include earthworms and leeches.
- Exhibit bilateral symmetry with a body divided into segments.
Mollusca:
- Includes clams, oysters, squids, and snails.
- Possess a soft body, generally protected by a hard shell.
- Exhibit diverse forms and habitats, ranging from aquatic to terrestrial.
Arthropods:
- Encompasses insects, crabs, lobsters, and ticks.
- Characterized by an exoskeleton, segmented body, and jointed appendages.
- The largest group of animals, highly diverse with various adaptations.
Echinoderms:
- Includes starfish, sea urchins, and sand dollars.
- Exhibit radial symmetry, primarily in adults.
- Possess a unique water vascular system for movement and feeding.

Description

Test your knowledge of the eight major groups of invertebrates with this informative quiz. From sponges to arthropods, learn about each group's unique characteristics and examples. Perfect for biology students and enthusiasts!