A population of white-footed mice becomes severely overpopulated. Which of the following represents a density-independent control on population growth of these mice? Decreased immune function in the mice due to stress related to overcrowding Increased numbers of owl predators due to the increased number of mice Temperatures much warmer than normal due to increased greenhouse gases, which disrupts the normal breeding cues for these mice Rapid transmission of diseases and parasites amongst the mice Lack of sufficient food and shelter for the high numbers of mice

Density, distribution, etc are some factors that are studied and analyzed to understand the population of a habitat. It all comes under the domain of population ecology. The correct option is (C) Option(C) is correct as the natural calamity is a density-independent factor that affects the population irrespective of density. The greenhouse effect is an anthropogenic activity that is a foreign influence on the mice population and it is not related to the density of the mice population. Option (A) is incorrect as it’s a typical example of a density-dependent factor. When there is competition for food, shelter, and other factors affect the population at that moment population has chances of weakening the immune system. Option (B) is incorrect as predation is a density-dependent factor. It is obvious that if the region is densely populated by the mice population, they would be easily caught by the predators. Option (E) is incorrect as food and shelter is a density-dependent factor. The denser the population in a habitat is, there are more chances of competition for shelter. Similarly, an increased population would make food a limiting factor for the growing population. Thus, these factors only arise and affect when the population increases its size. Option(D) is incorrect as the transmission of the disease is a density-dependent factor especially in the case of communicable diseases.

Answered: A population of white-footed mice…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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A population of white-footed mice becomes severely overpopulated. Which of the following represents a density-independent control on population growth of these mice?

		Decreased immune function in the mice due to stress related to overcrowding
		Increased numbers of owl predators due to the increased number of mice
		Temperatures much warmer than normal due to increased greenhouse gases, which disrupts the normal breeding cues for these mice
		Rapid transmission of diseases and parasites amongst the mice
		Lack of sufficient food and shelter for the high numbers of mice

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

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