All living things grow by undergoing mitosis, which refers to the process wherein somatic cells divide to produce new cells. An adult human body has approximately 37 trillion cells that divide at a rate of nearly 2 trillion times per day.Know More
Mitosis is one of two types of cell reproduction, also known as cell division. Mitosis is involved in growth and repair, while meiosis is involved in the reproductive process. The cells produced by mitosis, referred to as somatic cells, comprise the bulk of an organism.
Mitosis generates two daughter cells that are identical and contain an equal number of chromosomes as the parent cell. This process is divided into four major phases: prophase, metaphase, anaphase and telophase. During prophase, the DNA in the cell becomes tightly packed. A phase called prometaphase, links prophase and metaphase. In metaphase, the DNA's chromosomes align at the equator where they split and travel to the opposite poles of the cell in anaphase.
During the final phase of mitosis, the DNA decondenses to prepare for complete separation into two daughter cells in another process known as cytokinesis. The entire mitotic division repeats in a cycle to produce the numerous number of cells in living organisms, which drive growth and development. Specialized cells that perform a particular function group into tissues, specialized tissues group into organs, specialized organs comprise organ systems and organ systems make up a complete, complex living organism.Learn more about Biology
Living things need nitrogen to produce amino acids that allow the organism to live and grow. These amino acids are used to make proteins that build tissues and organs and regulate cellular function.Full Answer >
Living things need air, food and water because they are essential to the chemical processes that provide organisms with energy and keep them alive. These processes are collectively known as metabolism. The nutrients found in food, the oxygen found in air and the solvent property of water are indispensable components of metabolism.Full Answer >
Lipids, or fats, are used in living things in a wide variety of different ways, including energy storage and insulation. There are other beneficial properties that lipids can be used for, however, such as digestion and helping provide structure for certain parts of the structure of an organism's cells. In some living things, lipids are even part of the process by which hormones are formed in the body.Full Answer >
Living things that are composed of one cell are known as unicellular organisms. Examples of unicellular organisms include amoebas, bacteria and certain fungi. Unicellular organisms are either prokaryotes or eukaryotesFull Answer >