S. F. Khan 
Habitat Definition A habitat is a natural setting in which a certain organism lives and relies on its surroundings for survival, food, shelter, protection, and mating. The word habitat comes from the Latin word ‘habitare,’ which meaning ‘to occupy.’ The physical and biological aspects of an organism’s habitat define it. The nature of the soil, … Read more
What is Streak Plate Method ? Striking (Streak Plate Method) is a microbiology technique for isolating a pure strain from a single species of microbe, most commonly bacteria. Loeffler and Gaffky invented the dilution or isolation by streaking method in Koch’s laboratory, which includes systematically streaking bacteria across the exterior of the agar in a … Read more
Definition of Ribosomes The name ribosome is derived from two words: ribonucleic acid and ‘somes’, which is derived from the Greek word soma, which meaning “body.” Ribosomes are dense spheroidal particles with a diameter of 150 to 200 A0 found in most bacterial and eukaryotic cells. Protein synthesis takes place at these locations. They’re RNA … Read more
Monocot Leaves Definition Monocotyledonous plants have narrow, elongated leaves with parallel venation, which is used to distinguish them from dicots. Monocot leaves are isobilateral because the colour on both surfaces of the leaves is same. A proximal leaf base, or hypophyll, and a distal leaf hyperphyll make up the primordial monocot leaves. In dicots, the … Read more
Definition of Archaea Archaea is a group of early prokaryotes that form a unique domain from bacteria and eukaryotes based on their specific properties. The term “Archaea” comes from the Greek word “archaios,” which means “primitive” or “old,” implying the organisms’ primordial structure. Deep-sea vents, saline seas, hot springs, and even beneath petroleum deposits are … Read more
Vascular Plants Definition Vascular plants, also called tracheophytes, are terrestrial plants with lignified tissues that transmit water and minerals throughout the plant’s body. Water-conducting xylem tissue and food-conducting phloem tissue make up these lignified tissues, which are also known as vascular tissue. For the transportation of diverse chemicals, vascular tissue creates a central column, also … Read more
Natural Selection Definition Natural selection is the process by which an organism adapts to its changing environment by making selective changes to its genotype or genetic makeup. Natural selection, along with mutation, genetic drift, and migration, is one of the four fundamental mechanisms of evolution. During his evolutionary investigations, Charles Darwin popularised the concept of … Read more
Definition of Pseudostretified Columnar Epithelium The pseudostratified columnar epithelium is a form of epithelium made up of a single layer of cells that appears to have numerous layers due to the presence of distinct nuclei at different levels. Even though it appears as a stratified epithelium in crosssection, this epithelium is histologically a simple epithelium. … Read more
Simple Cuboidal Epithelium Definition Simple cuboidal epithelium is a form of simple epithelium made up of cube-shaped cells with rounds and a nucleus that is more or less in the centre. They are generally created to better suit the function of specific organs. All of the cube-shaped cells are directly linked to the basement membrane … Read more
Transitional Epithelium Definition Transitional epithelium is a sort of stratified epithelium made up of numerous layers of cells whose shape changes depending on the organ’s function. When the epithelium is relaxed, it appears cubical or round, with the exception of the apical layer, which appears flattened when stretched. Because this epithelium is almost exclusively found … Read more