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
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
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
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
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
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
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
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
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
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,
