Carbon Cycle: The carbon element is often considered as the basis of all life. Carbon is a basic constituent of living organisms. In fact, carbon is the most essential constituent of all the major organic compounds of the protoplasm (living substance) like carbohydrates, fats, proteins, and nucleic acids. In other words, the carbon element exists
What is Biogeochemical Cycle? The biogeochemical cycle may be defined as the more or less circular path which brings about the circulation of chemicals and elements, including all essential elements from the environment to the organisms and back to the environment. Types of Biogeochemical Cycle: Gaseous Cycles: In which the reservoir is in the atmosphere.
Nitrogen Cycle: The cyclic process by which nitrogen element is circulated continuously through the living and non-living components of the biosphere (like atmosphere, soil, water, plants, and animals) is called the nitrogen cycle in nature. In simple words, the circulation of nitrogen in nature is called the nitrogen cycle. Nitrogen gas of the atmosphere is
Water Cycle: The living organisms, atmosphere, and earth maintain between them a constant circulation of water referred to as hydrological or water cycle. All the plants and animals require water in order to carry on the activities of life. In fact, water is the major constituent of all living cells. Water (H2O) is a liquid
Oxygen Cycle: Oxygen is the second most abundant element in the earth’s atmosphere. Oxygen forms about 20.9 percent of the atmospheric gases. Oxygen is an essential element for the building up of living organisms and their life processes such as respiration. Oxygen exists in free molecular form as oxygen gas O2. Oxygen is present in
Buettner-Janusch has defined adaptive radiation as the rapid increase in numbers, and kinds of any evolving group of organisms into several distinctive econiches to which each group is particularly adapted. Thus, adaptive radiation is the spread of a species by way of evolving into progressively distinct types of organisms. From a single ancestral form different
What is Biotic or Ecological Succession? The biotic communities are not stable but undergo regular changes in a definite manner with the passage of time. Every community undergoes a series of changes until a group of organisms is established, which can live and reproduce most successfully in the area. “The change of plant and animal
Difference between Mitosis and Meiosis: The following are the difference between Mitosis and Meiosis- Mitosis Meiosis It takes place in somatic cells. It takes place in the reproductive cells (testes and ovaries). It produces two daughter cells with same number of chromosomes as the parent cell. It produces four daughter cells with half the number
What is Meiosis? Meiosis is a reductional division that takes place in the reproductive cells during the formation of gametes or spores. Meiosis occurs in the reproductive organs like testes, ovaries in animals, and in the essential parts (stamen and carpel) of flowers. Meiosis results in the formation of four daughter cells with half the
What is Mitosis? The process of cell division was observed first of all by the German biologist Walther Flemming and gave it the term mitosis, meaning thread formation. Mitosis is an equational process of cell division where the chromosomes are duplicated and are equally distributed both quantitatively and qualitatively into two daughter cells. Daughter cells
