Weegy: Pearl is a hard object produced within the soft tissues of a mollusk. Calcium carbonate is the main constituent of pearl.
User: A biological community in its environment such as a pond, an ocean, a forest, even an aquarium is known as -
a. biome
b. community
c. abiotic environment
d. ecosystem
Weegy: A biological community in its environment such as a pond, an ocean, a forest, even an aquarium is known as biome.
(More)