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.
In the 1860s, Gregor Mendel, an Austrian monk, revolutionized the field of genetics with his foundational work on inheritance patterns. His experiments with pea plants led to the development of Mendelian inheritance, which is based on the concept that heredity operates through discrete units called genes. These genes, according to Mendel, act independently within an … Read more
What is Mendelian Inheritance/Mendel’s Laws of Inheritance? Genetics Terminology of Mendelian inheritance These terms clarify how genes operate, how traits are inherited, and the relationship between genetic information and observable characteristics. Download the Cheat sheet pdf Mendel’s Experiment Gregor Mendel’s experiments between 1856 and 1863 laid the foundation for our understanding of genetic inheritance. Using … Read more
Fibre-yielding plants have played a crucial role in the advancement of human civilization, second only to food plants in their utility. Early humans relied on these plants to meet essential needs such as clothing, shelter, and tools. While animal products provided some solutions, plant fibers offered lighter and more flexible alternatives for tasks such as … Read more
What are Vegetable Oils and Fats? Vegetable oils and fats have been integral to human civilization since ancient times, with evidence of their use in various cultures for food, body care, and practical applications like soap-making. While early humans primarily relied on animal fats, different civilizations, including the Chinese, Hindus, and Egyptians, developed methods to … Read more
What are Beverages? Examples Of Nonalcoholic Beverages Containing Caffeine Coffee Tea Cocoa and Chocolate Mate Guarana Khat Cola Cassine Examples of Alcoholic beverages 1. FERMENTED BEVERAGES Fermented beverages represent a significant category within the alcoholic beverage industry, encompassing a diverse array of products derived from the fermentation of various plant materials. Here, we explore key … Read more
What is Tea? Types of Tea Tea is classified into several distinct types, primarily based on the processing techniques used after harvesting the Camellia sinensis leaves. Each type of tea varies in terms of oxidation, fermentation, and the preservation of specific chemical compounds such as polyphenols and catechins. Below is a detailed explanation of the … Read more
What are Spices? Spices obtained from roots and rootstalks Spices obtained from barks Spices obtained from flowers or flower buds Spices obtained from Fruits Spices derived from fruits encompass a diverse range of botanical origins, each contributing unique flavors and uses. Here, we explore notable examples, including their botanical names, families, parts used, morphology, and … Read more
What are Cereals? Cereals are among the most vital sources of plant-based food for humans and animals. They have held this significance since ancient times, with their cultivation dating back so far that their wild ancestors are no longer recognizable. Over centuries, numerous species and varieties have been developed, even before recorded history. The ancient … Read more
What is Centers of origin? The concept of “centers of origin” refers to the geographical regions where specific groups of organisms, whether wild or domesticated, initially emerged on Earth. This term is often associated with the origins of crop plants and wild species, reflecting the places where these organisms first evolved. It is important to … Read more
What are Prions? Definition of Prion A prion is an infectious, misfolded protein that causes neurodegenerative diseases by inducing abnormal folding of normal cellular proteins, leading to the accumulation of these misfolded proteins in the brain. Unlike other infectious agents, prions lack nucleic acids and propagate their abnormal structure through direct protein-protein interactions. Characteristics of … Read more