Biology

Definition Maintenance of a constant internal environment is called homeostasis. Internal environment The internal environment is the immediate surrounding of the cell which provides the medium for the cell to survive. Tissue fluid around cells, plasma around blood cells and lymph are included in the internal environment. When the internal environment is constant, the conditions inside cells are also constant. If there is a small change in the internal environment, it affect

Imagine a crowded concert hall and an empty hall next door. People naturally move from the crowded hall to the less crowded one until both halls have a similar number of people. Water molecules behave in a very similar way! What is Osmosis? Osmosis is the movement of water molecules from a region of high water concentration (higher number of water molecules) to a region of low water concentration (lower number of water molecules) through a partially permeable membrane. A part

What Is PCR? Imagine you find a single strand of hair at a crime scene. Inside that hair is a tiny, tiny amount of DNA that is barely enough to test. How do scientists work with something so small? The answer is PCR, Polymerase Chain Reaction. It's a technique that copies a specific segment of DNA millions (or even billions) of times, so there's enough to analyze. Think of PCR as a DNA photocopier PCR is fast, precise, and incredibly powerful. The Big Idea PCR takes a tiny p