It has been found that this disease is very well equipped in resisting malaria or in other words sickle cell anemia is a fairly effective resistant against malaria. The carrier of this always carry an amount of this disease in their blood cell as this genetic disease is very recessive in nature. For this reason this complementing disease is referred to as heterozygote advantage.This phenomenon happens because as a rule the malaria parasite needs to be embedded in blood cells to reproduce but the blood cell of an infected person resists the parasite plasmodium to settle down. Thereby depriving the parasite to reside and multiply. In this process, the sickle cell disease prevents the carrier from probable infection of malaria.The logistic growth curve of a population depends on several variables and conditions. It is basically a formulation of different stipulations under which the future depiction of a specific group population could be ascertained under a span of limited time period over a limited space. The assumption of the logistic growth curve of a population or determining growth as exponential depends on 4 main factors or variables.R selection denotes a condition wherein a less populated area or environment the species that is more favorable for survival would be the one with a rapid reproduction rate. According to the r selection, natural selection would always favor in these circumstances resulting in inefficiency in the surrounding of poor competitive ability.In this respect, and the contrary to the r selection, K selection denotes a populated environment where the condition favors the species with a low rate of reproduction under the circumference of natural selection. The K selection also denotes a condition that although there is a lower growth potential these organisms are deemed to be successful under K selection with greater capabilities for using and competing for scarce resources.