In a lake, reducing the population of a fish which feeds on plankton was followed by a declinein the rate of primary productivity. This is consistent with which one of […]
Tag: CSIR NET Life Science Previous Year Questions and Solution Population Ecology
CSIR NET Life Science Previous Year Questions and Solution on Population Ecology
No posts found.
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Top-Down and Bottom-Up Effects in Lake Ecosystems: Who Controls Whom?
In a lake ecosystem, bottom-up effects (B) refers to control of a lower trophic level by the higher trophic levels and top down effects (T) refer to the opposite. In […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Top-Down vs. Bottom-Up Effects in Lakes: Predicting Biomass Changes Across Trophic Levels
Two lakes (l and ll) with a similar trophic structure ofphytoplankton-zooplankton, planktivorous fish foodchain were chosen. To understand the ‘top-down’ effects, some piscivorous fish (those that feed on planktivorous fish) were introduced […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Density Dependence in Birth and Death Rates: Identifying the Incorrect Statement for Two Species
Which of the following statements about the birth rates (b1, b2) and death rates (d1, d2) of species 1 and 2 indicated in the figure is NOT true? (1) Birth […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Density-Dependent Effects on Birth and Death Rates: What the Graph Reveals About Two Species
The birth rates (b) and death rates (d) of two – species 1 and 2 in relation to population density (N) are shown in the graph. Which of the following […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Understanding Density-Dependent, Density-Independent, and Inversely Density-Dependent Factors in Population Regulation
An observation was made on a species experiencing three factors A, B and C in order to infer a density dependent population regulation by a factor. The following graph shows […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Graphical Representation of Bacterial Decline Under Depleting Nutrient Conditions
70 The correclining exponentially under depleting t graphical representation of a bacteria decnutrient condition is Introduction Bacterial growth and decline are fundamental concepts in microbiology and ecology. While much attention […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Which Factor Is Not Density Dependent? Understanding Population Regulation in Ecology
Among the following which is not an density dependent factor effecting population (1) Competition (2) Food (3) Temperature (4) Nutrients Introduction Population sizes in ecosystems are regulated by a mix […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Which Ecological Factor Is Not Density Dependent? Understanding Population Regulation
Among the following ecological factor which is not a density dependent factor (1) Food (2) Predation (3) Disease (4) Extreme temperatures Introduction Population sizes in nature are regulated by a […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Why Do Populations Fluctuate Around Carrying Capacity? The Role of Density-Dependent Factors
Temporary fluctuation in number of individuals aroundthe carrying capacity in most of populations is due to (1) density dependent factors (2) density independent factors (3) Bottle neck phenomenon (4) Interspecific […]
