The age distribution is one of the most fundamental characteristics of the populations. It is the most widely studied phenomenon by the demographers. Generally, they use the population pyramid that is the bar chart in which each of the horizontal group represents the individuals of the specific age groups. The age distribution of a … Read more
Abuse of drugs and alcohol by teens is very common and can lead to serious consequences. Nearly 70 percent of high school seniors have tried alcohol, 50 percent have taken an illegal drug and more than 20 percent have used a prescription drug for a non-medical reason. Research has found most people start misusing … Read more
Adaptive radiation is a process in the evolutionary biology, by which the organisms are rapidly diversified, from their ancestral species to the new life forms particularly due to change in the environment, which causes the availability of the new resources, and creates the new environmental niches. The process of adaptive radiation starts with the single … Read more
All the living organisms generate their new offspring by the process of reproduction, which is essential for the continuation of the species and all life forms. However, reproduction is not necessary for the survival of all organisms but it is essential to ensure that they are not going to extinct shortly. Mainly there are two … Read more