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.
Whta is Dirt and Soil? Direct Observation of the Samples Requirements Procedure Step 1: Wear Protective Gloves Before handling soil and dirt samples, put on a pair of gloves to maintain aseptic conditions and prevent contamination. Step 2: Preparation of Samples Using a spatula, scoop a small amount of dirt and place it onto a … Read more
Pond Water and Microorganisms Pond water is a fascinating ecosystem teeming with life, both visible and invisible to the naked eye. It encompasses a wide range of microorganisms, which are crucial to the balance and health of this aquatic environment. These tiny organisms contribute to various ecological processes, making the study of pond water a … Read more
Requirements for Gram stain Procedure Observation of Pseudomonas Aeruginosa Under Microscope When observing Pseudomonas aeruginosa under a microscope, several distinctive characteristics can be noted: In summary, under the microscope, Pseudomonas aeruginosa can be identified as Gram-negative rods with a reddish/pink coloration. They have a rod-like shape, are motile with a polar flagellum (sometimes more than … Read more
What is Stomata? Aim To prepare a temporary mount of a leaf peel in order to show the stomata of a leaf Principle/Theory The principle or theory of the stomata under a microscope experiment is based on the understanding that plants, as primary producers, perform essential physiological processes like photosynthesis and respiration. To facilitate these … Read more
What is Penicillium? Requirements for Penicillium Microscopy Procedure of Penicillium Microscopy General Tips When embarking on the fascinating journey of Penicillium microscopy, there are some essential tips to ensure a successful and rewarding experience. By following these guidelines, researchers and enthusiasts can unlock the hidden world of mold and delve into the intricate details of … Read more
What is Pollen? Requirements for Pollen Microscopy Sample Collection for Pollen Microscopy Observation of Pollen Under Stereo Microscope Requirements Procedure for Observation of Pollen Under Stereo Microscope Observing pollen grains under a stereo microscope is a captivating journey into the hidden world of botanical wonders. With its ability to provide a three-dimensional view, the stereo … Read more
Cheek cells, fascinating eukaryotic entities, grace the lining of our mouths. These microscopic wonders boast a distinct structure that encapsulates a world of biological marvels within their tiny boundaries. Thanks to their ease of shedding, acquiring them for observation has become a simple yet enlightening endeavor. Within the confines of these small entities, a realm … Read more
Under the lens of a microscope lies a world of wonder, and one of the fascinating creatures to observe is the humble worm. These ancient beings have been roaming the earth for hundreds of millions of years, evolving into the diverse forms we see today. In 2018, an article published in National Geographic unveiled the … Read more
Learn how to prepare and observe onion peel under a microscope, identify visible cell parts, compare magnifications, understand staining, results and precautions.
What is Protists? Protists are a group of eukaryotic organisms belonging to the Kingdom Protista. They are distinct from animals, plants, and fungi. While all protists are eukaryotes with a nucleus and cellular organelles, they can vary widely in their characteristics. The majority of protists are unicellular, although there are a few multicellular protists, with … Read more