Pollution Meaning Pollution is simply defined as the release of substances into the environment in quantities that are harmful to man and animals health. These substances released are called pollutants, they may be human-made or naturally occurring. Some examples of substances released into the environment include waste products of industries, refuse and …
What is Nitrogen Cycle? The Nitrogen Cycle is the process by which atmospheric nitrogen is converted to a form that is absorbable by plants. This occurs through free-living and symbiotic bacteria. The Nitrogen cycle is a necessary ecological process because getting atmospheric nitrogen into living organisms is difficult. Plants and phytoplankton are …
Phagocytosis is the act of ingestion and digestion of microorganisms, insoluble particles, damaged or dead host cells, and cell debris by specific types of cells called phagocytes such as macrophages, neutrophils; Phagocytosis is a form of endocytosis. The word Phagocytosis is derived from the Greek word-Phagein which means to eat; and it involves …
Lysosome Definition A Lysosome is a small cytoplasmic membrane-bound vesicle found in many types of animal cells that contains hydrolytic enzymes, which play an important role in the degradation of material ingested by phagocytosis and endocytosis. The word Lysosome was derived from the Greek word lysis (loosening) and soma (body). The limiting membrane of …
Mitochondria Definition The Mitochondrion (plural = mitochondria) is a membrane-bound cytoplasmic organelle in a cell concerned with the production of energy. It is a rod-shaped or oval-shaped structure with a diameter of 0.5 to 1. It is covered by a bilayered membrane. The outer membrane is smooth and encloses the contents. This …
Ribosomes Definition Ribosomes are small granules of RNAs responsible for the production of protein synthesis. The ribosomes of a cell may be freely scattered in a cell cytosol or may be bound to the surface of the rough Endoplasmic Reticulum. What are Ribosomes Ribosomes are small spherical and granular organelles bounded by …
What is Environmental Degradation? Environmental degradation is defined as any change or deterioration which causes severe harm to the natural environment through destruction of natural resources such as soil, water, and air including the ecosystem hence it is a decline in the quality of the natural environment. The rate of environmental impact varies with the cause, …