Community studies Essay Example | Topics and Well Written Essays - 250 words

Community studies - Essay Example Hence, the need for housing effectively creates an urban sprawl since the urban areas start spreading out and overrunning the underdeveloped areas and the rural communities. There is a realization that the pattern characterized by the urban sprawl is not sustainable for the future needs of the nation. In effect, the current patterns in development are moving towards ensuring that the consequences of urban sprawl do not affect the populace. One such current pattern of development is urban growth boundaries. In this case, the urban growth boundary is an official line separating the urban areas from its surrounding open greenbelt lands (â€Å"Urban Sprawl†, personal communication, n.d.). These lands include the parks, farms, and the watersheds. In effect, such a boundary is beneficial to the natural environment and maintains the flora and fauna without interfering with it. In addition, protection of farmlands ensures that the residents generally benefit by sustaining production. Another current development pattern meant to reduce the effects of the urban sprawl is new urbanism. This concept’s core principals are enhancing walkability, de-emphasizing the car, and creating some sort of a mix of services within a neighborhood (â€Å"New Urbanism†, personal communication, n.d.). In this case, bringing services to a walking distance within a residential area ensures that every individual resident benefits from the independence of movement. In addition, a reduction in the number and length of automobile trips minimizes traffic congestion, road maintenance expenses, and most importantly less pollution. Thus, the residents will benefit from the clean environment while there is channeling of public funds, saved from road maintenance, to other important areas of development. In addition, creating a mix of buildings enhances and facilitates evolution of the

BIOLOGY Essay Example | Topics and Well Written Essays - 500 words

BIOLOGY - Essay Example An outer membrane which forms the outer covering of the organelle and inner membrane which is twisted n folds to form specific structure called Cistae. There are granules attached in the inner folds of cistae and the inside of a mitochondrial is filled with mitochondrial matrix. The main function of mitochondria is to produce energy for the cell in the form of ATP hence the name ‘power house of the cell’. Ans3. Centrifuge is process through which we can obtain different cell organelles. The process works in a way that when a solution containing cells is centrifuged, the supernatant fluid containing our required cell organelles separates out on the surface which is then collected and observed under the microscope to study required cell organelle. Ans4. Hemoglobin is present in red blood cells and is a necessary component for living things to survive. Hemoglobin’s main function is transport of oxygen. When deoxygenated blood goes through the lungs, the hemoglobin in RBCs attracts oxygen towards it. Oxygen binds with hemoglobin in the blood cells and is carried out to the body tissues where it is released from the hemoglobin and blood once again goes to lungs for oxygenation. Ans5. The main mechanisms of transport through cell membrane are 1) Diffusion 2) Active transport and 3) passive transport. Diffusion is the simple moving of molecules through the cell membrane across a concentration gradient. Active transport occurs when a molecule is supposed to be transported against the concentration gradient. Active transport takes place with the help of specific carriers that carry our required molecules against the concentration gradient through specific channels and this process requires energy. Passive transport occurs when a molecules uses another channel to move across the cell membrane. Ans7. DNA consists of two ribose sugar strands which are joined by nucleic acids Adenine, Guanine, Cytosine, Thymine. These bases form the inner