An amino acid is an organic molecule that is made up of a basic amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R group (or side chain) that is unique to each amino acid.
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Earth's greenhouse gases trap heat in the atmosphere and warm the planet. The main gases responsible for the greenhouse effect include carbon dioxide, methane, nitrous oxide, and water vapor (which all occur naturally), and fluorinated gases (which are synthetic).
Stamens are the male reproductive parts of flowers<span>. A stamen consists of an anther and a filament. The pollen consists of the male reproductive cells; they fertilize ovules.</span>
Linnaeus’s original system had only two kingdoms. Later, this system was modified, which include 5 kingdom classifications.
Initially in the Linnaeus’s classification, all the organisms were divided into two kingdoms. These two kingdoms were animalia and plantae.
Later, the modifications occurred and 5 kingdom classification including animals, plants, fungi, protists and monera was introduced. The 5 kingdom classification is the most accepted classification till now.
