The water cycle, also known as the hydrological cycle, describes the continuous movement of water on, above, and below the surface of the Earth. It is

Agriculture is the practice of cultivating soil, producing crops, and raising livestock for food, fiber, fuel, and other products used to sustain huma

global warming, " which is the long-term increase in Earth's average surface temperature due to human activities, primarily the emission of greenhouse

The cell theory is a fundamental principle in biology that describes the basic unit of life and the organization of living organisms. It consists of t

Acid rain is a form of precipitation that is unusually acidic, meaning it has elevated levels of hydrogen ions (low pH). It is primarily caused by emi

Bacteria are microscopic, single-celled organisms that are found virtually everywhere on Earth. They are incredibly diverse and have adapted to thrive

Mycoplasma, " which is a genus of bacteria that lack a cell wall around their cell membrane. They are the smallest bacterial cells yet discovered, typ

Crops are plants that are cultivated and harvested for food, fiber, biofuel, medicine, and other uses. They are essential for sustaining human and ani

The nucleus is a fundamental part of a cell that contains most of the cell's genetic material, organized as DNA molecules along with a variety of pro