EmailSave<span>Jupiterimages/Photos.com/Getty ImagesSnakes in popular myth and representation have often been a source of intrigue, fear and demonization. These portrayals have made it more difficult to perceive of such a creature as imparting any benefits on its surroundings. This is most assuredly not the case, as snakes serve valuable roles in the great majority of ecosystems in which they are found. There are instances, however, where their sudden introduction has proven problematic.<span><span>IdentificationThe term biotic factors refers to the way in which an organism -- such as a snake -- interacts with its environment or ecosystem. In particular, it pertains to the way the presence, activities and feeding patterns of that animal affect other living things within that environment. Biotic factors of snakes involve how they impact the necessary balances that make their ecosystem function, especially with regard to a snake's role as both predator and prey.</span><span>PredatorsAll species of snakes are carnivorous or feed on meat. While different species have various methods for killing their prey (constriction or poison), snakes, in general, hunt a variety of creatures. These include, but are not limited to, rodents, insects, birds, small deer, as well as fellow reptile species. In human eyes, this often characterizes snakes as a valuable form of pest control. Snakes' prolific presence in many different habitats -- water, forests, mountains, deserts and other -- make them formidable predatory forces in regions the world over.</span><span>PreyWhile the conventional image of snakes usually portrays them as dangerous predators, the fact is that snakes themselves are prey to many animals. They are not always on top of the food chain. This is especially the case for smaller snakes that are not venomous nor big enough to ward off a large attacker. Some species of birds eat snakes, as do coyotes, foxes and mongoose. When humans are present, snakes are used for their skins and, on occasion, for food. This demonstrates snakes versatile role in the ecosystems as both hunter and hunted.</span><span>Florida Case StudyWhile snakes are natural components of many ecosystems, there is the possibility that the introduction of a certain specie to a foreign environment can be dangerous. This is reflected in the early 21st century 'invasion' of the state of Florida by the imported Burmese python. While many snakes already existed in related areas of the state, the new python found no natural predators and, in fact, found itself hunting the former head of the food chain, the alligator. Scientists are still pursuing methods for monitoring the Burmese python and for stemming an expansion of the species throughout the state ecosystem.</span></span></span>
Obligate anaerobe. <span>Obligate anaerobes metabolise energy by </span>anaerobic respiration<span> or </span>fermentation <span>and </span>obligate anaerobes<span> die in the presence of oxygen.</span>
Chitin is a polysaccharide made up of N - acetylglucosamine .
Fungi cell walls are made of chitin. Chitin is also the major ingredient of the exoskeletons of crustaceans and arthropods. Spiders, beetles, butterflies, lobsters, shrimps and crabs all have chitin in their protective armor.
when intermixed with protein and other pigments, it forms different levels of hardness and a variety of distinct colors. Alone, chitin appears translucent and not hard. In arthropods, it is secreted by epidermal cells.
<span>The spark of life is heavily debated but many scientists believe that lightning in the Earth's atmosphere created the atmospheric conditions necessary for the molecular process. Certain elements such as water vapor and hydrogen sulfide were part of a bonding process that began the first spark of life.</span>
Tetracyclines are antibiotics used against a wide range of microorganisms, such as bacteria, chlamydia, rickettsia and some protozoa parasites. <span>They inhibit synthesis of protein in bacteria by inhibiting the binding of transport RNA and ribosome and</span> are effective against both gram-positive and gram-negative bacteria.