ZOOLOGY 250- Lecture 16 Notes 2025/2026 Exam Questions and Answers | 100% Solved

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ZOOLOGY 250- Lecture 16 Notes
2025/2026 Exam Questions and Answers
| 100% Solved



How many members in the Conchifera class Bivalvia? - 🧠 ANSWER ✔✔~10,000


Conchifera class Bivalvia are marine/freshwater/terrestrial? - 🧠 ANSWER

✔✔Marine and freshwater


What are some examples of the Conchifera class Bivalvia? - 🧠 ANSWER

✔✔Mussels, oysters, scallops, clams, oysters


Conchifera class Bivalvia are highly modified for? - 🧠 ANSWER ✔✔For

burrowing and feeding on fine particles

Conchifera class Bivalvia are compressed in what way? - 🧠 ANSWER

✔✔Compressed laterally


Conchifera class Bivalvia are fully enclosed by? - 🧠 ANSWER ✔✔By a shell

composed of two valves (hence 'Bivalvia') that are hinged together dorsally with an

elastic ligament and kept aligned with hinge teeth


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The valves in Conchifera class Bivalvia are closed using? - 🧠 ANSWER ✔✔Using

adductor muscles

What are the 6 shared features of the Conchifera class Bivalvia? - 🧠 ANSWER

✔✔1. Bivalve shell




2. Loss of radula




3. Byssus (autobranchs)




4. Lateral compression of body




5. Adductor muscles




6. Ligament associated with hinge of shell

T or F: there is great cephalization in Conchifera class Bivalvia - 🧠 ANSWER

✔✔False, they lack radula, eyes, and tentacles



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STATEMENT. ALL RIGHTS RESERVED