____and ____ are the two basic processes that contribute to an increase in population density.
- Natality and Immigrati
- Mortality and Immigration
- Mortality and Emigration
- Natality and Emigration
The Correct Option is A
Solution and Explanation
Population density is the per-person unit area. There are four factors that determine the population density of an area. They are: Immigration: This is the action of people coming from outside to live in a certain place. Emigration: This is the action of leaving a place and moving to another. Natality: This is the ratio of number of birth to the size of the population. This is also known as the birth rate. Mortality: This is the number of death in a population at a given time. So out of these, in order to increase the population density, natality, and immigration are required.
Top Questions on organisms and populations
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List I
List II
A Logistic growth I Unlimited resource availability condition B Exponential growth II Limited resource availability condition C Expanding age pyramid III The percent individuals of pre-reproductive age is largest followed by reproductive and post reproductive age groups D Stable age pyramid IV The percent individuals of pre-reproductives and reproductive age group are same - NEET (UG) - 2023
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List I (Interaction) List II (Species A and B) A. Mutualism I. +(A), O(B) B. Commensalism II. –(A), O(B) C. Amensalism III. +(A), –(B) D. Parasitism IV +(A), +(B) Choose the correct answer from the options given below:
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Match List I with List II.
List I (Interacting species)
List II (Name of interaction)
A Leopard and a Lion in a forest/grassland I Competition B A Cuckoo laying egg in a Crow’s nest II Brood parasitism C Fungi and root of a higher plant in Mycorrhizae III Mutualism D A cattle egret and a Cattle in a field IV Commensalism Choose the correct answer from the options given below
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\( dN/dt = rN \)
'N' stands for:- CUET (UG) - 2023
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Concepts Used:
Organisms and Populations
Organisms:
An attached living system that lives in an environment is commonly known as an organism. These organisms are able to retain certain behaviors and structures. Some examples of organisms are plants, animals, bacteria, fungi, and humans. A group of these organisms leads to the formation of a population. The collection of the population forms a community that assists in the operation of ecosystems.
Each and every organism has the ability to adapt itself to various conditions of the environment. This capacity of organisms is due to their genetic variations. It is due to this only that their probability of survival get increases. For instance, camels adapt themselves to survive in desert areas and polar bears adapt to the extreme cold conditions or situations through their dense fur coat.
Populations:
A collection of organisms or individuals of a species that live, at a specific time, in a geographical area that is well-defined and capable of interbreeding is described as a population.
Read More: Organisms and Populations