Solved Examples on Organisms and Population

Question1: The abundance of a species population within its habitat is called [CBSE PMT 1995]

(a) Niche density 

(b) Absolute density      

(c) Relative density        

(d) Regional density

Answer: a

Explanation: The abundance of a species population within its habitat is called niche density.

Question2: Which of the following factors regulate human life with reference to population density [AMU 1989; CPMT 1994]

(a) Availability of blood, housing and health facilities  

(b) Urbanisation  

(c) Climatic conditions                          

(d) All the above

Answer: d

Explanation: All of the above factors regulate human life with reference to population density.

Question2: The concept that "Population tends to increase geometrically while food supply increase arithmetically" was put forward by [BHU 2000 CBSE PMT 1995]

(a) Thomas Malthus       

(b) Adam Smith   

(c) Stuart Mill        

(d) Charles Darwin

Answer: a

Explanation: The hastily written text, An Essay on the Principle of Population as it Affects the Future Improvement of Society, with Remarks on the Speculations of Mr. Godwin, M. Condorcet, and Other Writers, was published by Thomas Robert Malthus.