Avatar for Sourav Pan

Sourav Pan

Founder of Biology Notes Online, Biology & Microbiology Educator, M.Sc. in Microbiology
Expertise
Microbiology, Immunology, Cell Biology, Molecular Biology, Genetics, Biotechnology, Biochemistry, Botany, Zoology
Education
University of Calcutta
Profile Last Updated: August 10, 2026

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.

Innate Immunity – Definition, Types, Mechanism, Functions

Innate Immunity

Innate immunity is the natural defence system of the body which is present from birth. It gives immediate protection against invading pathogens like bacteria, viruses, fungi and parasites. It acts in a non-specific manner and does not require previous exposure to the antigen. Innate immunity is the first and primary defence system of the body … Read more

Chytridiomycota Overview

Chytridiomycota Overview

Chytridiomycota is a sub-group of zoosporic organisms from the kingdom Fungi. They are also known as chytrids. Named after the Ancient Greek word khutridion, which means “little pot”, it refers to the structure that contains unreleased zoospores. The earliest diverging fungal lineages are the Chytrids. Their membership in kingdom Fungi can be seen with chitin cell wall, posterior whiplash flagellum and absorptive nutrition. They also use glycogen to store energy and produce lysine through the a-amino acid (AAA).

Phylum Ascomycota Overview

Phylum Ascomycota Overview

The Ascomycota sac fungi is monophyletic and comprises about 75% of the described fungi. It comprises the majority of fungi that mix together with algae to create lichens as well as the vast majority of fungi do not have morphological evidence for sexual reproduction. Among the Ascomycota are some famous fungi: Saccharomyces cerevisiae, the yeast of commerce and foundation of the baking and brewing industries (not to mention molecular developmental biology), Penicillium chrysogenum, producer of penicillin, Morchella esculentum, the edible morel, and Neurospora crassa, the “one-gene-one-enzyme” organism. 

Epidermophyton floccosum

Epidermophyton floccosum

Epidermophyton floccosum is a type of filamentous  fungus which causes nail and skin infection in human beings. The anthropophilic dermatophyte may cause diseases like tinea pedis (athlete’s foot) and tinea cruris, tinea corporis and even onychomycosis. The diagnostic methods for fungal infection are physical examination, testing for culture, and molecular examination. Treatment for fungal infections … Read more

Nephron – Definition, Structure, Physiology, Functions

Nephron - Definition, Structure, Physiology, Functions

What is Nephron? Definition of Nephron A nephron is the basic functional unit of the kidney responsible for filtering blood and producing urine. It consists of a glomerulus (a cluster of capillaries) and a tubule, which processes the filtrate by reabsorbing water and essential substances while excreting waste products. Types of Nephron Nephrons, the functional units … Read more

Characters of Algae | General Characters of Algae

This table is the table of p-values for chi-squares.

In this article, we will discuss some important characters of algae. Algae is a photosynthetic eukaryotic organisms. They can be found everywhere such as soil, water, rocks, sands, etc. But most of them grow in the aquatic environment. Here is the some General Characters of Algae – Characters of Algae 1. Occurrence 2. Thallus organization … Read more

Bovine Spongiform Encephalopathy (BSE)- Mad Cow Disease

Bovine Spongiform Encephalopathy (BSE)- Mad Cow Disease

What is Bovine spongiform encephalopathy? Sources and causes of contamination of Bovine Spongiform Encephalopathy (BSE) Pathogenic mechanism of Bovine Spongiform Encephalopathy (BSE) Signs and symptoms of Bovine Spongiform Encephalopathy (BSE) Epidemiology of Bovine Spongiform Encephalopathy (BSE) Diagnosis of Bovine Spongiform Encephalopathy (BSE) Treatment and Vaccination Prevention and control measures of Bovine Spongiform Encephalopathy (BSE) Prevention … Read more

Sporozoa – Definition, Examples, Classification and Characteristics

Sporozoa - Definition, Examples, Classification and Characteristics

What is Sporozoa? Short Definition of Sporozoa Sporozoa are unicellular, parasitic organisms that undergo complex life cycles involving two hosts and alternating between sexual and asexual stages. Classification of Sporozoa  Characteristics of Sporozoa Motility of Sporozoa Feeding of Sporozoa Types of Spores Sporozoans, a group of parasitic protozoa, can be classified into four categories based … Read more

Zooplankton – Definition, Characteristics, Types, Importance

Zooplankton - Definition, Characteristics, Types, Importance

What is Zooplankton? What exactly are Zooplanktons? Zooplankton, a subset of the broader planktonic community, are heterotrophic organisms that inhabit both freshwater and marine environments. The term “plankton” encompasses a diverse array of organisms that float or drift within aquatic realms. Among these, zooplankton are distinguished by their heterotrophic nature, signifying their reliance on external … Read more