Factors that limit the reproductive potential, Biology

Organisms are made to compete for their needs from the environment. The competition as we pointed earlier could be for the food and territory, to overcome the adverse climatic conditions, to escape from predators or tp combat an infectious diskase. This is indeed the "struggle" It is this "struggb" that keeps the population numbers under manageable levels and from increasing on a logrithmic scale. We earlier referred to the reproductive potential of frogs. If the potential is fully realised, then in a short time, they would be placing a severe strain on the resources on which they depend and soon all of them would starve. However, this is not the case. Most of the population sizes do not increase enormously but they only fluctuate to asmall extent from time to time. Some other populations'however, do increase aramatically in certain seasons and decrease even more dramatically in certain other seasons. In laboratory one can grow cell cultures in which any one of the resources such as food, space etc. is limited. Under these circumstan~es the population growth rate of the cells which is exponential to begin with decreases and levels off: The resulting sigmoidcurve is characteristic of biological growth in general. (Fig. 11.1) The factors that we n. mentioned earlier are the ones which delimit the numbers or size to the carrying capacity of the environment in natural populations. For instance, the 'carrying capacity of the environment for plants is controlled by the ambunt of spact! required 'by the individuals of their own and other species. No new seeds or shoots can develop in that particular area until the older plants fall. Population sizes in animals, as mdntioned earlier can be limited by food supply. Here the number of individuals ,increases until the food shortage occurs. Such a shortage of resources would decrease,the reproduction.

Posted Date: 4/6/2013 1:02:43 AM | Location : United States







Related Discussions:- Factors that limit the reproductive potential, Assignment Help, Ask Question on Factors that limit the reproductive potential, Get Answer, Expert's Help, Factors that limit the reproductive potential Discussions

Write discussion on Factors that limit the reproductive potential
Your posts are moderated
Related Questions
In an outline form only, attempt the classification of the phylum arthropoda

Define drug-nutrient interaction and drug- drug interactions? Generally, administering oral medication along with the food or at a mealtime is a convenient manner of drug dosin

Explain Nutritional Requirements of Microbes? Microorganisms require various nutrients and physical factors for their existence and growth. Nutrients are substances used in bio

Chlorine (Cl) - Micronutrients The role of Cl - in plant is not clearly understood. Cl - is required in Hill reaction, the water splitting reaction of photosystem II. In the

What information does the pain receptor relay to the brain about stimuli below threshold


What is the spontaneous generation hypothesis? The impulsive generation abiogenesis or hypothesys asserts that life on earth has come from nonliving material. For instance, t

Q. Illustrate Omega Taxonomy? After synthesising a basic classification, the taxonomist can attempt to improve upon it. Therefore, the observed facts are interpreted in Omega t

Cake mix evaluation  Originally, cake mix formulations were very similar to bakery cakes and utilized standard "Hi-Ratio" cake oils; however, development of improved cake mixes

GENETIC TERMINOLOGY (i)         Gene - Mendel used the term factor for a gene. A gene is the unit of DNA responsible for the appearance and inheritance of character. (ii)