The correct answer is chitin. This glucose derivative is in
fact the main building block of cell walls in not only arthropods (including
the shrimp), but also fungi and insects, and also has a structural function in
the scales of fish. The most similar commonly-known substance in terms of
function is keratin, which makes up our hair and nails.
Polysaccharide - a carbohydrate with molecules that have a number of sugar molecules bonded together
Disaccharide - sugar that is formed when two monosaccharides bond together
Monosaccharide - basic unit of carbohydrates; also known as simple sugars
In cytoplasm protein formation takes place and the site of protein syntheis is RIBOSOMES
Its so simple. Two alleles means three genotypes.
consider a gene has two alleles A(blue eyes) and a(brown eyes)
possible combinations:
1. AA - Homozygous dominant -Blue eyes.
2. Aa - Heterozygous - Blue eyes.
3. aa - Homozygous recessive - Brown eyes.
Neither of these are minerals, B.
Its not A because, they are not natural materials but instead made up of natural materials, like a rubber tree.
Its not C because, like I said, plastic is made from rubber trees, this garentees it doesnt have a crystal structure.
Its not D because, concrete is not a mineral and has indefinite composition.
