Why is a shell considered to be biotic? because It comes from something living. A shell is considered biotic (living) because it is a hard, rigid covering of many animals such as snails, sepia, pila, turtles, and sea urchins.
A shell is the protective outer layer of these soft-bodied animals. Shells are made of calcium carbonate in the form of calcite or aragonite crystallized in an organic matrix. Shells of other animals are composed of chitin, bone, or cartilage. That’s why a shell is considered biotic (living).
A shell is considered to be biotic because it is a product of a living organism. It is a hard, rigid structure that is produced by many animals as a means of protection and defense.
Shells are found on a wide variety of animals, including snails, sepia, pila, turtles, and sea urchins. Shells are made of a variety of materials, including calcium carbonate, chitin, bone, and cartilage.
Calcium carbonate is a chemical compound that is found in the shells of many marine animals. It is crystallized in an organic matrix to form calcite or aragonite, which are the two main types of shells found in the animal kingdom.
Chitin is a tough, semi-transparent material that is found in the shells of many insects and crustaceans. It is a polymer of N-acetylglucosamine, a sugar that is found in the shells of many marine animals.
Bone and cartilage are also used by some animals to construct their shells. These materials are more flexible than calcium carbonate and chitin, and they are often used by animals that need a more flexible or lightweight shell.
Overall, a shell is considered to be biotic because it is produced by living organisms and is an integral part of their anatomy. It serves a variety of important functions, including protection, defense, and support, and it is an important adaptation that has allowed many animals to thrive in their environments.
While shells are not alive in the traditional sense, they are considered to be biotic because they are produced by living organisms and are an important part of their anatomy.