Kingdom Monera – Classification, Characteristics, Importance, Examples

Kingdom Monera - Classification, Characteristics, Importance, Examples

What is Monera? Definition of Monera Monera is a historical biological kingdom encompassing prokaryotes, which are unicellular organisms lacking a distinct nucleus. This kingdom primarily included bacteria and archaea, and its members are characterized by the absence of membrane-bound organelles. Over time, taxonomic classifications have evolved, and the term “Monera” is less commonly used today. … Read more

Embryological Evolution

Embryological Evolution

The study of embryology, also known as embryos, is a key element of evolution in biology and can identify the commonalities and differences between different species. The embryo of an organism refers to the fertilized egg that it progresses through the stages of development, which are unique to the particular species. In examining how the … Read more

Facilitated Diffusion – Definition, Principle, Examples

Facilitated Diffusion - Definition, Principle, Examples

What is Facilitated Diffusion? Facilitated diffusion Definition Facilitated diffusion is a passive transport process in which specific molecules move across a biological membrane with the aid of specialized transmembrane proteins, following their concentration gradient without the direct use of energy. Principle of Facilitated diffusion – How does facilitated diffusion work? The principle of facilitated diffusion … Read more

Simple Diffusion – definition, principle, examples, applications

Simple diffusion definition, principle, examples, applications

Definition of Simple diffusion  Simple diffusion is one of the types of passive transport that is, as the name implies is the simple movement of solute that happens when the electrochemical potentials of one side of the permeable barrier differ. Principle of Simple diffusion/How does simple diffusion work? In free diffusion across a membrane, solute … Read more

Control Group – Definition, Importance, Examples

Control Group - Definition, Importance, Examples

What is Control Group? Definition of Control Group A control group is a set of subjects in a scientific experiment who do not receive the treatment or intervention being studied, serving as a benchmark for comparison against the treatment group to determine the effect of the variable under investigation. Importance of Control Group The control … Read more

Cell membrane (Plasma Membrane) Structures and Functions

Cell membrane (Plasma Membrane) Structures and Functions

What is Cell membrane or Plasma Membrane? Definition of Cell membrane or Plasma Membrane The cell membrane, also known as the plasma membrane, is a semi-permeable biological barrier that surrounds and protects the cell’s interior from the external environment, regulating the passage of molecules in and out of the cell. Cell Membrane Composition  The cell … Read more

Whittaker’s Five Kingdom Classification – Criteria, Advantages and Limitations

Whittaker's Five Kingdom Classification - Criteria, Advantages and Limitations

Whittaker’s Five Kingdom Classification brings evolutionary changes in classification system of organisms. Since the centuries, biologists are trying to classify organisms in different ways. Even, Greek philosopher and polymath Aristotle tried to classify organisms on the basis of their habitats, such as whether they lived on land, water, or air.  Then Carolus Linnaeus proposed a … Read more

Genus – Definition, Advantages, Uses, Examples

Genus - Definition, Advantages, Uses, Examples

What is Genus? Definition of Genus A genus is a taxonomic rank in biological classification that groups together species with shared characteristics or evolutionary lineage, positioned above species and below family. Classification System The Naming System In the realm of biological taxonomy, the system of binomial nomenclature stands as a cornerstone for naming organisms. This … Read more

Experimental Group – Definition, Importance, Examples

Experimental Group - Definition, Importance, Examples

What is Experimental Group? Definition of Experimental Group The experimental group, in scientific research, refers to the group subjected to specific changes or treatments in a variable to observe and evaluate potential outcomes, in contrast to a control group which remains unaltered or standardized for comparison. How Does an Experimental Group Work? In the context … Read more

Endosymbiotic Theory – Origin of the eukaryotic cell

Endosymbiotic Theory - Origin of the eukaryotic cell

What is Endosymbiotic Theory? Definition of Endosymbiotic Theory The Endosymbiotic Theory posits that certain organelles in eukaryotic cells, specifically mitochondria and chloroplasts, originated from free-living prokaryotic cells that were engulfed by ancestral eukaryotic cells, leading to a mutually beneficial symbiotic relationship. Origin of the eukaryotic cell 1. Gene Trees and the Complexity of Eukaryotic Origins … Read more

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