Earth Day is celebrated every year on the 22nd of April. In 1970, a senator from Wisconsin, USA, Gaylord Nelson first conceived of this day. The senator was worried about the rate of industrialization and the careless attitude of everyone towards our environment.
What is the difference between DNA and RNA ?
Each strand is composed of a long chain of monomer nucleotides. The nucleotide of DNA consists of a deoxyribose sugar molecule to which is attached a phosphate group and one of four nitrogenous bases: two purines (adenine and guanine) and two pyrimidines (cytosine and thymine).
DNA = DeoxyriboNucleic Acid
There are thought to be between 250,000 and 315,000 species of plants in the kingdom Plantae. The kingdom encompasses ferns, conifers, trees, mosses, flowering plants with seeds, green algae and all other plants that derive energy through carbon from photosynthesis.