Crypt
(Science: pathology) deep pit that protrudes down into the connective tissue surrounding the small intestine. The epithelium at the base of the crypt is the site of stem cell proliferation and the differentiated cells move upwards and are shed 3-5 days later at the tips of the villi.
One of Mendel’s law of inheritance is the “law of dominance”. Read this tutorial to know more about this form of i..
This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..
This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..
Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..
Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..