The above graph illustrates two lines that represent the immigration and extinction rates for an island based on its distance from mainland (solid line) and its size (dotted line). Which […]
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CSIR NET Life Science Previous Year Questions and Solution on Ecology
How to Calculate Net Reproductive Rate (R₀) for a Seasonally Breeding Species
The following table shows survival and fertility data for a seasonally breeding species. Based on above data net reproductive rate (Ro) of the species will be (1) 1 (2) 5 […]
CSIR NET Life Science Previous Year Questions and Solution on Biogeography
Decoding Island Size and Isolation in MacArthur and Wilson’s Island Biogeography Model
A researcher working on island biogeography mapped how isolation-controlled immigration (l), and area-controlled extinction (E), will act on number of species present on the islands. He forgot to label the […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
What Happens When Mortality and Natality Rates Are Constant in Each Age Group?
If rate of mortality and natality become constant in each age group. Then the result would l increasebe- (1) Number of children increase (2) Number of older one will increase […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
What Is the Average Number of Offspring a Female Produces in Her Lifetime? Understanding Fecundity
11.The average number of offspring that a female produces during her lifetime is called (1) Fecundity (2) Net reproduction rate (3) Survivorship curve (4) Reproductive Mortality What Is the Average […]
CSIR NET Life Science Previous Year Questions and Solution on Biogeography
Which Concept Is Not Central to the Theory of Island Biogeography?
18. The theory of island biogeography has synthesized into theory the following concepts, except: (1) Competition (2) Immigration (3) Equilibrium (4) Speciation Core Concepts Synthesized in the Theory MacArthur and […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Matching r and K Strategies to Growth and Survivorship Curves: A Complete Guide
Given below are growth and survivorship curves. Select the correct combination of growth curves from figure A and survivorship curves from figure B given above, that would best represent r […]
CSIR NET Life Science Previous Year Questions and Solution on Biogeography
Understanding MacArthur and Wilson’s Equilibrium Model: Decoding the Island Biogeography Graph
Following figure shows McArthur and Wilson’s equilibrium model of biota on a single island In this figure, terms A, B, C and D in order are (1) extinction. immigration, equilibrium […]
CSIR NET Life Science Previous Year Questions and Solution on Biogeography
The Enemy Release Hypothesis: Why Invasive Species Thrive in New Environments
Invasive species, in general grow very well in a new area that they invade, and often outcompete native species. An explanation for the better growth and propagation of invasive species […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Understanding Survivorship Curves: Elephants, Lizards, and Oysters Compared
Given below are the survivorship curves showing the proportion of individuals surviving over time or age. Three generalized types of curves (a, b and c) are depicted below. Which of […]
