The long feather train of a peacock is quoted as an example supporting (1) Hamilton’s rule. (2) Zahavi’s handicap principle (3) The Red Queen hypothesis. (4) Haldane’s rule. What […]
Category: CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Honest Signaling in Mate Choice: Why Organisms in Poor Condition Signal Less
Sexually reproducing organisms employ signals to attract mates. If such signals honestly reflect an individual’s quality, then which of the following is expected? (1) Organisms in poor metabolic condition signal […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Why Sexual Selection Favors Female Choice: The Role of Reproductive Investment in Evolution
Sexual selection results in variation in the reproductive success of males, often due to female choice with particular phenotypes. This type of sexual selection is because (1) Males cannot compete […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Experimental Evidence for Female Choice in Birds: What the Tail-Cutting Experiment Reveals About Sexual Selection
In order to demonstrate that the long tails of males attracted females in a bird species, experimenters captured and cut the tails of ‘n’ number of males and monitored the […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
The Peacock’s Tail: A Classic Example of Sexual Selection in Evolution
The peacock’s tail is an example of (1) natural selection (2) diversifying selection (3) sexual selection (4) group selection What Is Sexual Selection? Sexual selection is a form of […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
The Evolution of Male Ornamentation: How Sexual Selection Drives Extravagant Traits
During evolution increased ornamentation in male is a result of (1) Directional selection (2) Co-evolution (3) Sexual selection (4) Natural selection What Is Sexual Selection? Sexual selection is a […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Understanding the Four Major Species Concepts in Biology
Four different species concepts are given below: A. Species separate based on their use of different ecological niches and their presence in different habitats and environments. B. Differences in physical […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Cladogenesis: Understanding the Evolutionary Splitting of Lineages
The given below is the graphical representation of the changes in morphological features over a period of the geological time scale, where population A accumulates heritable morphological features and give […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Decoding Sexual Isolation in Salamanders: Linking Genetic, Geographic, and Mating Data
In a study of sexual isolation in a species of salamander, scientists brought together males and females from different populations and from the same population. They observed the frequency of […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Temporal Isolation in Frogs: How Differences in Breeding Seasons Prevent Hybridization
Temporal isolation in breeding seasons between closely related species leads to reproductive isolation. Given below are breeding seasons of different species of frogs. Which of the above plots represents temporal […]
