Day: December 18, 2021

A virus consists of two main parts: the genome and the envelope. The genome is made up of either DNA or RNA. It may be circular, linear, or single-stranded, and may occupy a single nucleic acid molecule, or multiple segments of a larger molecule. Different types of viruses have different replication strategies, and some are more complex than others. The envelope, or outer layer, is derived from the cell membrane. The virus’s envelope is made up of protein that prevents it from being seen. The viral genome contains DNA and […]

Earth is the third planet from the Sun. It is the only object in the universe that is known to harbor life. Its surface is covered with land, with 29.2% of the planet’s surface consisting of continents and islands. In fact, it is the only object in the universe that has liquid water, but there are other bodies of water – like the moon – that we know of. The oceans make up the remaining 75 percent. The Earth’s mantle is 3,000 kilometers thick and begins approximately 30 kilometers beneath […]