Sourav Pan is the founder and sole author of Biology Notes Online. He holds a Bachelor of Science (B.Sc.) degree and an M.Sc. in Microbiology from the University of Calcutta. He creates educational resources covering microbiology, immunology, biotechnology, genetics, cell biology, botany, zoology, and other life-science subjects.
His goal is to make complex biological concepts easier to understand through well-structured, student-friendly articles based on academic textbooks, peer-reviewed research, and authoritative scientific sources. In addition to writing new content, he regularly reviews and updates articles to improve their accuracy, clarity, and educational value.
What is Bioinformatics? Definition of Bioinformatics Bioinformatics is the interdisciplinary field that combines biology, computer science, and mathematics to store, analyze, and interpret large-scale biological data, such as DNA, RNA, and protein sequences, through the development of computational tools and algorithms. History of Bioinformatics Aim of Bioinformatics The primary goals of bioinformatics are outlined as … Read more
In this article you will. learn about Medico-ethnobotanical sources in India;Significance of the following plants in ethnobotanical practices (along with their habitat and morphology) a) Azadiractha indica b) Ocimum sanctum c) Vitex negundo. d) Gloriosa superba e) Tribulus terrestris f) Pongamia pinnata g) Cassia auriculata h) Indigofera tinctoria. Role of ethnobotany in modern medicine with … Read more
Ethnobotany is a specialized field of biology dedicated to understanding the intricate relationships between human societies and plants. This discipline focuses on the knowledge and practices of indigenous and rural communities concerning plant use, encompassing their medicinal, nutritional, and cultural significance. By delving into these interactions, ethnobotany aims to uncover valuable plant-based resources that can … Read more
What is Ethnobotany? Definition of Ethnobotany Ethnobotany is the scientific study of how people from different cultures use and interact with plants for purposes such as food, medicine, and rituals. It examines both traditional knowledge and cultural practices related to plants. History of Ethnobotany Concept of Ethnobotany Scope of Ethnobotany Ethnobotany in India Ethnobotany in … Read more
What is Freeze Fracture Technique? Principle of Freeze Fracture Technique The principle of the freeze-fracture technique is based on the physical separation of biological membranes at their hydrophobic core when the sample is frozen and then fractured. Here are the key aspects of this principle: Overall, the freeze-fracture technique provides valuable insights into the functional … Read more
Polyploidy plays a pivotal role in plant breeding, especially in enhancing the genetic diversity and adaptability of crops. Polyploidy refers to the condition in which a plant has more than two complete sets of chromosomes, a state that naturally occurs due to irregularities in mitotic or meiotic divisions. These irregularities can lead to an increase … Read more
What is Distant Hybridization (Wide hybridization)? Definition of Distant Hybridization Distant hybridization, or wide hybridization, refers to the crossing of individuals from different species or genera that are more distantly related than varieties within the same species, aiming to introduce novel traits and increase genetic diversity. History of Distant Hybridization Objectives of Distant Hybridization Barriers … Read more
Mutations play a significant role in crop improvement by introducing genetic variability, which can be harnessed to develop new and improved crop varieties. A mutation is defined as a sudden and heritable change in an organism’s characteristics. This definition implies that the change must be inheritable, though it does not specify the genetic mechanisms underlying … Read more
What is Heterosis? Heterosis, commonly known as hybrid vigor, refers to the phenomenon where the offspring of two genetically different parents exhibit greater vigor, growth, yield, or other desirable traits than either of the parent strains. This increased performance in hybrids is a key concept in plant breeding and agriculture. Here’s a closer look at … Read more
What is Dominance Hypotheses? The Dominance Hypothesis refers to a concept in plant breeding and genetics that deals with the expression of traits in offspring based on the dominance of alleles. It essentially posits that in a heterozygous state, one allele (the dominant allele) can mask the expression of another allele (the recessive allele). Here’s … Read more
