8th Grade Mollusca Quizzes , Questions & Answers

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Exploring the Anatomy and Functions of Bivalvia Molluscs

Explore the fascinating anatomy and functions of Mollusca through this educational resource. Featuring detailed pictures and diagrams, it enhances understanding of molluscan shell structures and their biological significance,...

Questions: 27 | Attempts: 31 | Last updated: Aug 4, 2025

Sample Question 1
What are examples of organisms belonging to Mollusca-Class Bivalvia?

Starfish (Asterias)

Includes hardshell clam (Mercenaria), Freshwater muscle (Anodonta) Oyster (Crassostrea) Oysters have specialized structures (catch muscles) and lack Anterior adductor muscle.

Sea urchin (Echinoidea)

Octopus (Octopus vulgaris)

Sample Question 2
What is the term for the bulge of the shell in the exterior structure of bivalvia?

Hinge ligament

Periostracum

The bulge of the shell is the umbo

Nacre

Sample Question 3
What can be found in the interior structure of a bivalvia?

Right side has adductor muscle scars

Presence of gills for respiration

Left side has adductor muscle scars

Open circulatory system for blood circulation

8th Grade Mollusca Quizzes , Questions & Answers

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