Day: November 24, 2021

Viruses are infectious agents that replicate within the living cells of organisms. They are the most common types of microorganisms, including bacteria, archea, plants, and animals. Although their origin is unknown, a virus is a submicroscopic agent that infects all kinds of life. They are found in all kinds of environments, and they are responsible for many types of diseases. Read on to learn more about viruses and how they affect us. Viruses come in many shapes and sizes. Some are shaped like a cell, while others are shaped like […]

The Earth and Its Parts The Earth is the only astronomical object known to harbor life. It is the third planet from the Sun and comprises 29.2% of the entire planet’s surface. Land is a major component of the Earth’s ecosystem and is the most abundant source of oxygen. The continents and islands that are found on the Earth are the largest land masses. There are several types of land. Some of these are volcanic in nature while others are submerged. The Earth’s upper mantle is comprised of iron and […]