lids
proteins
calcium compounds
organic salt
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these guys are correct o. the question was the chitin are strengthened by not made up of. so it's calcium compounds o precisely calcium carbonate.
The cuticle (non-cellular protective covering) in arthropods forms a rigid exoskeleton, composed mainly of chitin, which is periodically shed as the animal grows. The exoskeleton's middle zone is made of both protein and chitin and is responsible for the strength of the exoskeleton. It may be additionally strengthened by minerals, such as calcium.
The chitin in the exoskeleton of arthropods is strengthen by protein and minerals such as calcium carbonate.
d is d ans cus calcium functn x to give strength while protein help to build up d body
chitin is strengthened by the deposit of hardened protein and minerals
so both protein and calcium compounds are correct
While you all have given your widow's mite in providing answer to this question, I so much believe that we all understand simple English.
Chitin is strenthened by deposits of hardened protein (not just ordinary protein as seen in the option) as well as calcium compounds.
Hence, calcium compounds is the most correct answer.
The correct answer is C. calcium compounds.
Chitin is a polysaccharide that provides structural support to the exoskeleton of many arthropods, such as insects, crustaceans, and arachnids. While chitin itself is a robust molecule, its strength and rigidity are enhanced by the deposition of calcium compounds, such as calcium carbonate or calcium phosphate, into the chitin matrix. This process, called calcification, helps to harden the exoskeleton and provide additional protection and support to the animal.
Proteins (option B) are also associated with chitin in the exoskeleton, but they do not primarily strengthen it. Instead, they often serve as cross-linking agents or help to organize the chitin fibers.
Lipids (option A) are not related to the composition or strengthening of chitin.
Organic salts (option D) are not typically associated with the strengthening of chitin in arthropod exoskeletons.
In arthropods, chitin is strengthen by the deposit of mainly hard proteins and may be aided by calcium.
so the correct option is b
The chitin in the exoskeleton of many arthropods is strengthened by **proteins**. The exoskeleton is composed of skeletal elements with physical properties that are adapted to their function and the eco-physiological strains of the animal. These properties are achieved by forming elaborate microstructures that are organized in several hierarchical levels like the so-called twisted plywood structure, which is built by stacks of planar arrays of complex chitin-protein fibres. So, the correct answer is **B. Proteins**.
