pattern formation
(Science: cell biology) One of the classic problems in developmental biology is the way in which complex patterns are formed from an apparently uniform field of cells.
Various hypotheses have been put forward and there is now evidence for the existence of gradients of diffusible substances (morphogens) specifying the differentiative pathway that should be followed according to the concentration of the morphogen around the cell.
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics – Definition: Heredity and ..
Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..
Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..
This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..
