Strategies For Enhancement In Food Production Question 37
Question: Pearl is secreted around the
Options:
A) Mantle layer
B) Foreign particle between prismatic and nacreous layer
C) Foreign particle between mantle and nacreous layer
D) The shell
Show Answer
Answer:
Correct Answer: C
Solution:
When a foreign material such as a sand grain or a parasite happens to enter the body it adheres with the mantle.
The mantle epithelium at once grows over the material in the form of a sac and enclose it.
This mantle epithelium starts secreting concentric layer of nacre around the foreign material.
The completed structure is called pearl.
BETA
