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Photoautotroph – Definition, Importance, Examples

Photoautotroph - Definition, Importance, Examples

What is Photoautotroph? Definition of Photoautotroph A photoautotroph is an organism that synthesizes its own organic compounds using light energy and inorganic carbon, primarily through the process of photosynthesis. Examples include plants, algae, and certain bacteria. How does Photoautotrophs Get Their Nutrition? Photoautotrophs obtain their nutrition through a process called photosynthesis. Here’s a detailed explanation … Read more

Phototropism – Definition, Types, Mechanism, Importance, Examples

Phototropism - Definition, Types, Mechanism, Importance, Examples

What is Phototropism? Definition of Phototropism Phototropism is the directional growth of an organism, especially plants, in response to a light stimulus. Phototropism Lecture Video Phototropism Discovery – Early Experiments The phenomenon of phototropism, where plants grow directionally in response to light, has been a subject of scientific intrigue for centuries. Pioneering experiments by eminent … Read more

Phylogeny – Definition, Importance, Limitations, Examples

Phylogeny - Definition, Importance, Limitations, Examples

What is Phylogeny? Definition of Phylogeny Phylogeny is the study of the evolutionary history and relationships among species or groups of organisms, represented visually by a phylogenetic tree. What is Molecular Phylogeny? Molecular phylogeny, a specialized subset of phylogeny, harnesses the power of molecular sequencing to decipher evolutionary relationships and histories among various organisms. Traditional … Read more

Phylum – Definition, Importance, Examples

Phylum - Definition, Importance, Examples

What is Phylum? Definition of Phylum A phylum is a high-level taxonomic rank in biology, ranking below kingdom and above class, used to categorize and group organisms with shared fundamental characteristics and evolutionary relationships. Examples of Phylum 1. Phyla in Kingdom Monera Within the taxonomic realm of Kingdom Monera, encompassing both Eubacteria and Archaea, the … Read more

Scientific Method – Dfinition, Steps, Examples, Importance

Scientific Method - Dfinition, Steps, Examples, Importance

What is Scientific Method? Definition of Scientific Method The scientific method is a systematic procedure used in scientific research to formulate hypotheses, gather data through observation and experimentation, and draw conclusions based on empirical evidence. It emphasizes objectivity, repeatability, and falsifiability in the pursuit of knowledge. Scientific Method Steps The scientific method is a systematic … Read more

Sporangium – Definition, Characteristics, Structure, Importance

Sporangium - Definition, Characteristics, Structure, Importance

What is Sporangium? Definition of Sporangium A sporangium is a specialized cellular structure in plants and fungi responsible for the formation, encapsulation, and dissemination of spores. Characteristics of Sporangium Structure of Sporangium The sporangium is a specialized structure designed for the production and protection of spores. Its structure can vary depending on the organism, but … Read more

Taxonomy – Definition, Hierarchy, Example, Importance

Taxonomy - Definition, Hierarchy, Example, Importance

What is Taxonomy? History of Taxonomy Taxonomy, the science of classifying living organisms, has evolved significantly since its inception. The journey of taxonomy traces back to ancient civilizations, undergoing various transformations through the ages, influenced by the works of numerous scholars and the advent of scientific methodologies. Ancient Beginnings: The earliest inklings of taxonomy can … Read more

Turgor Pressure – Definition, Mechanism, Functions

Turgor Pressure - Definition, Mechanism, Functions

What is Turgor Pressure? Definition of Turgor Pressure Turgor pressure is the internal force exerted by water against a cell’s plasma membrane and its supporting cell wall, primarily observed in plants, fungi, and bacteria, resulting from the osmotic flow of water into the cell. Mechanism of Turgor Pressure Turgor pressure, a fundamental concept in cellular … Read more

Unicellular organism – Definition, Types, Importance, Examples

Unicellular organism - Definition, Types, Importance, Examples

What is Unicellular organism? Evolutionary History of Unicellular Organisms The evolutionary trajectory of unicellular organisms is a testament to the intricate processes that have shaped life on Earth. These microscopic entities, which form the foundation of the biological hierarchy, have a rich and complex history that spans billions of years. All cellular life forms exhibit … Read more

Eye and Ear Microbiome – Normal Flora of Eye & Ear

Eye and Ear Microbiome - Normal Flora of Eye & Ear

What is Eye and Ear Microbiota (Microbiome) or Normal Flora of Eye & Ear? Normal Flora of the Ear Microorganism Type Category Staphylococcus spp. Gram-positive Bacteria Alloiococcus otitis Gram-positive Bacteria Corynebacterium spp. Gram-positive Bacteria Microbacterium spp. Gram-positive Bacteria Bacillus spp. Gram-positive Bacteria Arthrobacter spp. Gram-positive Bacteria Turicella otitidis Gram-positive Bacteria Micrococcus spp. Gram-positive Bacteria Moraxella … Read more

Kirby Bauer Disk Diffusion Susceptibility Test Protocol

The McFarland standards 0.5, 1.0, 2.0, and 3.0 are placed in front of a Wickerham card. Using McFarland standards, bacterial suspensions are prepared to a given turbidity. In accordance with the methodology for the Kirby-Bauer disc diffusion susceptibility test, the bacterial suspension of the organism to be examined should correspond to the 0.5 McFarland standard.

What is Kirby Bauer Disk Diffusion test? The Kirby-Bauer disk diffusion test is a laboratory method used to determine the effectiveness of antibiotics against bacterial strains. The test is named after its inventors, Drs. Paul Kirby and Robert Bauer, who developed it in the 1960s. In the Kirby-Bauer test, a bacterial culture is spread evenly … Read more

History and Scope of Microbiology

History and Scope of Microbiology

What is Microbiology? Microbiology is the study of microorganisms, which are tiny, single-celled organisms that are found almost everywhere on Earth. These microorganisms include bacteria, viruses, fungi, algae, and protozoa, and they play vital roles in many aspects of our lives. Microbiology encompasses a wide range of disciplines and applications, including the biology of microorganisms, … Read more

Scope of Microbiology in Nursing

Scope of Microbiology in Nursing

As their name suggests, microorganisms are minute organisms with the potential to adapt to their environment; for instance, commensals can become pathogenic in certain altered environments. The adaptability of microbes to certain treatments or medications remains a challenge for nurses and other medical professionals. Microbiology influences the lives of a nurse working in a medical … Read more

Starter Culture – Definition, Types, Preparation, and Applications

Starter Culture - Definition, Types, Preparation, and Applications

Starter Culture Definition A starter culture is a microbial preparation containing a very high number of cells (such as 1012 g-1) of one or more microbe species that is given to raw material to produce fermented food by accelerating and directing fermentation. Functions of Starter Cultures The fundamental function of lactic starters is to convert … Read more

Probiotics – Definition, Mechanisms, Health Effects

Probiotics - Definition, Mechanisms, Health Effects

Probiotics Definition Probiotics are living microorganisms that mitigate the negative effects of antibiotics by restoring the body’s natural homeostasis. Probiotics are identified by their genus, species, and a strain-specific identifying name (e.g. Lactobacillus rhamnosus GG) and are available in a range of formulations, including yoghurt drinks, pills, and nutritional supplements. Probiotic Bacteria The majority of … Read more

Prebiotics: Definition, Types, Sources, Mechanisms

Prebiotics: Definition, Types, Sources, Mechanisms

Definition of Prebiotics Types of Prebiotics There are numerous varieties of prebiotics. The majority of them are a subset of carbohydrate groups and are largely oligosaccharide carbohydrates (OSCs) (OSCs). 1. Fructans 2. Galacto-Oligosaccharides 3. Starch and Glucose-Derived Oligosaccharides 4. Other Oligosaccharides 5. Non-Carbohydrate Oligosaccharides Criteria for Eligibility as Prebiotic To qualify as prebiotic, food items … Read more

Vegetative Propagation Definition, Types, Methods, Advantages

Vegetative Propagation Definition, Types, Methods, Advantages

Many plants can reproduce genetically identical offshoots or clones of themselves through asexual reproduction. These offshoots then become independent plants. This is known as vegetative reproduction or vegetative propagation. Fragmentation is one way that vegetative propagation can occur. This means that a part of a plant can be regrown into a new plant. There are … Read more

Fragmentation – Definition, Steps, Importance, Advantages, Disadvantages

Fragmentation Reproduction Definition, Examples, Advantages, Disadvantages

What is Fragmentation? Definition of Fragmentation  Fragmentation is a form of asexual reproduction in which an organism or part of it breaks into smaller pieces, each capable of developing into a fully mature individual. General Steps of Fragmentation Fragmentation is a pivotal biological process characterized by its systematic progression through distinct stages. This method of … Read more

Budding – Definition, Process, Advantages, Disadvantages

Budding Definition, Process, Advantages, Disadvantages

What is Budding? Definition of Budding Budding is a form of asexual reproduction in which a new organism develops from an outgrowth or “bud” on the parent organism, eventually detaching to live independently. Types of Budding Budding is a form of asexual reproduction wherein a new organism develops from an outgrowth or “bud” on the … Read more

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