The following statements explain various evolutionary outcomes: (A) Within a lineage, organisms show a constant rate of extinction. (B) Even in the absence of changing interactions, organisms are constantly evolving. […]
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CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
The Red Queen Hypothesis: The Evolutionary Arms Race Between Hosts and Parasites
The “Red Queen Hypothesis” is related to (1) the mating order in the harem of a Polygamous male. (2) the elimination by deleterious mutations by sexual reproduction. (3) mate selection […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Co-evolution: The Driving Force Behind Immune System Diversity
Major reason for evolution for diversity in immune system is (1) Natural selection (2) Neutral mutations (3) Directed evolution (4) Co-evolution The Evolutionary Arms Race: Hosts vs. Pathogens Co-evolution […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Co-evolution: How Organisms Influence Each Other’s Evolutionary Pace
An organism influence the evolutionary pace of the other organism in (1) Co-evolution (2) Parallel evolution (3) Convergent evolution (4) Divergent evolution What is Co-evolution? Co-evolution is defined as the […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Why Commensalism Does Not Drive Co-evolution: Understanding Species Interactions
Among the following interactions which will not force co-evolution? (1) Commensalisms (2) Parasitism (3) Mutualism (4) Interspecific competition What Is Co-evolution? Co-evolution occurs when evolutionary changes in one species […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Co-evolution: How Predators and Prey Shape Each Other’s Evolutionary Path
The changes in prey brings changes in predator and vice-versa. Such an evolution due to competition for existence is termed as- (1) Converging evolution (2) Diverging Evolution (3) Co-evolution (4) […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
The Peacock’s Tail and Zahavi’s Handicap Principle: Honest Signals in Evolution
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 […]
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 […]
