The flora and fauna of Colombia is one of the most diverse in the world, grouped into 74 general natural ecosystems. This variability of environments and their biodiversity is a product of the geographical location of Colombia and its varied relief. Colombia is located in the extreme northwest of South America, presenting a tropical climate,
The Barr body is a mass of heterochromatin condesada observed inside female somatic cells of mammals and other animals. It is usually easy to see during the mitotic interface stage. Many scientists attribute this high concentration of heterochromatin to the inactivation of one of the two X chromosomes. This region is intensely stained during cytological
Beta amyloid (AB) or beta amyloid peptide (ABP) is the name given to peptides of 39-43 amino acids and between 4-6 kDa in molecular weight that are the product of the metabolism of the amyloid precursor protein (APP) when processed by the amyloidogenic route. The term amyloid (starch-like) refers to the fact that the deposits
The ovalbumin is the most abundant protein in the “clear” eggs of birds. It belongs to the family of proteins known as “serpin” or “serine protease inhibitor”, which is a highly diverse group of eukaryotic proteins (includes more than 300 homologous proteins). It was one of the first proteins isolated with great purity and, thanks
Elasmotherium sibiricum was a mammal that existed during the Pleistocene epoch in the Quaternary period of the Cenozoic Era. It is considered an ancestor of the current rhinoceros, since due to its characteristics it is included in the same family as this, the Rhinocerotidae. This animal was first described in 1808 by the German paleontologist
The soil limestone or lime are those with a high content of calcium carbonate. They are mineral soils whose formation has been conditioned by the climate. They have been classified as calcisols and are characterized by secondary accumulation of carbonates and high silt content. The presence of high levels of calcium carbonate determines a basic
The wildebeest ( Connochaetes ) is a placental mammal that belongs to the Bovidae family. It has a robust body, with the forequarters more developed than the hindquarters. A long beard hangs on its neck and its limbs are elongated, ending in two-fingered legs and sharp hooves. The genus Connochaetes includes two species: the blue
The steroids are lipids (fats) and are classified as such because they are hydrophobic compounds and thus are insoluble in water. Unlike the other known lipids, steroids are composed of a 17-carbon nucleus made up of four fused or intertwined rings, named with the letters A, B, C, and D, respectively. The term “steroid” was
The conductive tissues of plants are responsible for orchestrating the long-distance passage of nutrients through the different structures of the plant organism. Plants that present conductive tissues are called vascular plants. There are two classes of conductive tissues: xylem and phloem . The xylem is made up of tracheal elements (the tracheids and tracheas) and
The glucans are perhaps the most abundant carbohydrates in the biosphere. Most make up the cell wall of bacteria, plants, yeasts, and other living organisms. Some make up the reserve substances of vertebrates . All glucans are made up of one type of repeating monosaccharide: glucose. However, these can be found in a great variety
