What is Domain? Definition of Domain In biology, a domain is the highest taxonomic rank used to categorize and group organisms based on shared characteristics and evolutionary history. Domain in the Tree of Life Development of the Domain System The conception and evolution of the domain system, a fundamental framework for the classification of life, … Read more
What is 3 Domains of Life? The intricate tapestry of life, as we understand it today, is a culmination of extensive scientific research and discoveries. Historically, the living world was bifurcated into two primary domains: Eukaryotes (Eukarya) and Prokaryotes (Bacteria). This classification was rooted in microscopic observations, particularly the presence or absence of membrane-bound nuclei … Read more
What is Controlled Experiment? Definition of Controlled Experiment A controlled experiment is a scientific investigation in which a researcher deliberately manipulates a specific variable, while keeping all other variables constant, to determine its effect on a system under study. How Does Controlled Experiment Works? A controlled experiment works by systematically testing a hypothesis through the … Read more
What is Feedback mechanism? Definition of Feedback mechanism A feedback mechanism is a regulatory system within a process or organism that responds to changes by either amplifying (positive feedback) or counteracting (negative feedback) them to maintain equilibrium or homeostasis. Open and Closed-Loop Feedback Mechanisms Feedback loops are integral components in the maintenance of homeostasis within … Read more
What is Motility? Definition of Motility Motility refers to the ability of an organism or cell to move autonomously by utilizing metabolic energy. Types of Motility Motility, a fundamental biological phenomenon, is exhibited through various mechanisms across different organisms. The mechanisms underlying motility are intricate, reflecting the evolutionary adaptations of organisms to their environments. Here, … Read more
What is Microorganism? Definition of Microorganism A microorganism, or microbe, is a tiny living organism that is invisible to the naked eye and can exist as single-celled entities or colonies of cells. Discovery of Microorganisms Microorganisms, despite their minuscule size, have had a profound impact on our understanding of life and disease. The journey of … Read more
What is Microevolution? Definition of Microevolution Microevolution refers to small-scale changes in allele frequencies within a population over a relatively short period of time, driven by mechanisms such as mutation, selection, gene flow, and genetic drift. Causes of Microevolution 1. Mutation 2. Selection 3. Genetic drift 4. Gene flow Difference between microevolution and macroevolution Microevolution … Read more
What is Histology? Definition of Histology Histology is the scientific study of the microscopic structure of biological tissues. Sample preparation Methods in Histology Histological analysis necessitates meticulous sample preparation to ensure accurate microscopic observation. The preparation techniques vary based on the specimen type and the intended observation method. Herein, we delineate the primary steps involved … Read more
What is Osmotic Pressure? Definition of Osmotic Pressure Osmotic pressure is the force required to prevent the flow of solvent molecules through a semi-permeable membrane due to differences in solute concentrations between two solutions. Osmotic Pressure Equation Osmotic pressure, a fundamental concept in the study of solutions, can be quantitatively described using a specific equation. … Read more
What is Organism? Definition of Organism An organism is a living entity composed of one or more cells, capable of growth, reproduction, and response to stimuli, functioning as an individual life form. Structure of an Organism Every organism, whether unicellular or multicellular, is fundamentally composed of cells, the basic structural and functional units of life. … Read more
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