An individual deer will be killed in a forest fire regardless of how many deer happen to be in that area. Its chances of survival are the same whether the population density is high or low. Many factors, typically physical or chemical in nature , influence the mortality of a population regardless of its density. An individual deer may be killed in a forest fire regardless of how many deer happen to be in that area.

Population at any given time is composed of individuals of different ages.  Natural selection results from interactions between organisms and their environments. A limiting factor of a population wherein large, dense populations are more strongly affected than small, less crowded ones. This page is integrated marketing communications (imc) represents the product element of the four ps. licensed under a not declared license and was authored, remixed, and/or curated by Boundless. A detailed versioning history of the edits to source content is available upon request. If a water molecule is represented by 100, then a wolffia plant is about 1020 power larger than the water molecule.

Predation is an interspecific interaction, where an animal called predator kills and consumes the other weaker animal called prey. 6.Population interactions explain that in nature, animals, plants and microbes cannot live in isolation but interact in various ways to form a biological community. The rate of breeding varies from species to species, e.g. Pacific salmon fish, bamboo breed only once in their life time, while most birds and mammals breed many times in their life. Darwinian fitness states that the populations evolve to maximise their reproductive fitness in the habitat in which they live.

Population can grow exponentially for a certain period of time and then assumes a steady state, as the resource availability becomes limited at some point of time. Competition This is an interaction, where both species suffer due to same requirement of resources, that are limited, e.g. In some South American lakes, visiting flamingoes and resident species compete for the common food. Mention the different ways by which the population density of different species can be measured.

Bacteria are prokaryotes that reproduce quickly, about an hour for many species. If 1000 bacteria are placed in a large flask with an abundant supply of nutrients , the number of bacteria will have doubled from 1000 to 2000 after just an hour. In another hour, each of the 2000 bacteria will divide, producing 4000 bacteria. After the third hour, there should be 8000 bacteria in the flask.

S human carrying capacity is unlimited, based on the notion that technological advances always increase effectively available resources faster than industrial activity depletes them. Explain with the help of figures, the three different types of age pyramids represented by human population. Logistic growth curve B is considered more realistic one because the resources are finite and become limiting sooner or later. In the absence of predators, the curve ‘B’ would appropriately depict the competition for limited food and shelter resources within the prey population.

It weighs about 150 micrograms (1/190,000 of an ounce), or the approximate weight of 2-3 grains of table salt. One plant is 165,000 times shorter than the tallest Australian eucalyptus and seven trillion times lighter than the most massive giant sequoia . European rabbit was introduced into Australia in the 1800s, and its population grew unchecked, wreaking havoc on agricultural and pasture lands. The myxoma virus subsequently was released among the rabbit populations and greatly reduced them.