Amwoga Khalwale
Nucleoside is a structural sub-unit of nucleic acids, the heredity-controlling component of all living cells, consisting of a molecule of sugar linked to a nitrogen-containing organic ring compound. Nucleosides are usually obtained by chemical or enzymatic decomposition of nucleic acids. In nucleosides, the sugar is either ribose or deoxyribose and the nitrogen-containing compound is either … Read more
What Are Deuterostomes And Protostomes? Deuterostomes are the animals whose embryonic development undergoes radial cleavage. In other words, the cell division planes take place radially during the formation of the blastula through cleavage of the fertilized egg embryo. In deuterostomes, the first cavity formed by the blastopore ends up as the organism’s anus, while the … Read more
Nutrition is a biological study of food and various modes of nutrition of living organisms. It is one of the ways the living organisms obtain energy required for all the vital processes of the body. On the basis of nutrition, all the organisms are divided into two main groups- autotrophs and heterotrophs. Their corresponding modes … Read more
Cilia and Flagella are small hair like cytoplasmic processes arising from the free margins of the cell. These structures have the same internal length; however they differ in size, length, number and chemical composition. Cilia and flagella are made up of microtubules and are covered by an extension of the plasma membrane. They also motile … Read more
Cilia and microvili are two types of projections in the plasma membrane. Microvilli are microscopic cellular membrane protrusions that increase the surface area for absorption. Cilia on the other hand, are narrow and long hair like protuberances from the apical surface of some epithelial cells. Both microvilli and cilia consist of protein fibers that extend … Read more
Flagellum is a long, whip-like structure that helps some single-celled organisms move. It is composed of microtubules. Flagella help propel cells and organisms in a whip-like motion. They are found in all three domains of the living world, that is, archaea, bacteria and eukaryote. Flagella not only provide movement for bacteria but also provide a … Read more
Primary and secondary successions are the two types of Ecological succession. An ecological succession is the process of change in the species structure of an ecological community over time. Ecological succession in an ecosystem is caused by disturbances that create new environmental conditions. A disturbance is an ecosystem allows for sunlight, nutrients and habitat to … Read more
P-type and n–type semiconductor are both classification of extrinsic semiconductors. The major factor that generates a difference between p-type and n-type semiconductor is the material used in doping the intrinsic semiconductor (pure conductor). The n-type semiconductor material is formed by addition of group V elements (pentavalent impurity) to a pure conductor intrinsic semiconductor). Examples penta-valent … Read more
Wave motion transfers energy from one point to another without permanent displacement of the particles of the medium. A wave can be transverse or longitudinal depending on the direction of its oscillation. Below is a detailed explanation of differences between longitudinal and transverse waves in the context of their characteristics, behaviors, and real-world implications. Longitudinal … Read more
A shaper is a type of machine that uses linear relative motion between the work-piece and a single-point cutting tool to machine a linear toolpath. Shapers acan be categorized as standard, draw-cut, horizontal, universal, vertical, geared, crank, hydraulic, contour and travelling head. In most cases, a shaper has a horizontal arrangement. In a standard shaper … Read more