'Ecology’ was coined by a follower of Charles Darwin who was a known Zoologist. He suggested new ideas of human evolutionary descent. He claimed that the ontogeny (the embryology and development of the individual) had been briefly, and often necessarily incomplete, recapitulated, or repeated, phylogeny (the evolutionary history of the species or race).
The term ecology was coined by Ernst Haeckel, in 1866.
Ecology deals with the study of the dependence and interaction of organisms with their environment. The term ecology is believed to have been coined by Ernst Haeckel although its first authentic use was made by Reiter in 1885. The word originates from the Greek word ‘oikos’, meaning a "place to live."
Brief History:
Also Read: Principles of Inheritance & Variation
A wooden block of mass M lies on a rough floor. Another wooden block of the same mass is hanging from the point O through strings as shown in the figure. To achieve equilibrium, the coefficient of static friction between the block on the floor and the floor itself is
In an experiment to determine the figure of merit of a galvanometer by half deflection method, a student constructed the following circuit. He applied a resistance of \( 520 \, \Omega \) in \( R \). When \( K_1 \) is closed and \( K_2 \) is open, the deflection observed in the galvanometer is 20 div. When \( K_1 \) is also closed and a resistance of \( 90 \, \Omega \) is removed in \( S \), the deflection becomes 13 div. The resistance of galvanometer is nearly:
Population ecology is the study of these and other questions about what factors affect population and how and why a population changes over time. Population ecology has its deepest historic roots, and its richest development, in the study of population growth, regulation, and dynamics, or demography. Human population growth serves as an important model for population ecologists, and is one of the most important environmental issues of the twenty-first century. But all populations, from disease organisms to wild-harvested fish stocks and forest trees to the species in a successional series to laboratory fruit files and paramecia, have been the subject of basic and applied population biology.