Given that Asian Koel is a brood parasite, which one of the following statements is TRUE for this species? (1) The brood of the bird is usually infested with parasitic […]
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CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
Innate Behavior in the Common Cuckoo: How Parasitic Chicks Ensure Their Survival
The common cuckoo, a parasitic bird, lays eggs in the nests of other bird species. Soon after the cuckoo egg hatches, the chick shoves the nest owners’ eggs out of […]
CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
Ad Libitum Sampling: Why It’s Not Suitable for Studying Pteridophyte Distribution Patterns
Which one of the following methods is NOT useful for sampling pteridophytes to study their distribution patterns? (1) Ad libitum sampling (2) Quadrat sampling (3) Belt transect sampling (4) Random […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Cope’s Rule: The Evolutionary Law of Increasing Body Size Over Geological Time
Which law states that evolution tends to increase body size over geological time in a lineage of populations? (1) Copes rule (2) Allen’s rule (3) Bergman’s rule (4) Jordon’s rule […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Why Do Eyeless Cavefish Retain Genes for Eye Development? Exploring Genetic, Evolutionary, and Functional Explanations
The following statements are potential explanations for the continued existence of genes that control eye development in eyeless cavefish. A. They have inherited these genes from their ancestors and this […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Evolutionary Changes Observable on a Human Time Scale: Understanding Rapid Adaptations
Which of the following events/examples represent observation of evolutionary changes on a human time scale? Here human time scale is defined by an average human age of approximately 70-80 years. […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Threats to Plasmid-Host Symbiosis: How ‘Copy-Up’ Mutations Challenge Evolutionary Stability in Bacteria
Plasmids are self-replicating small circular DNA elements in bacterial cells that can be said to have a stable symbiotic existence with the host cell. They often carry genes useful to […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Punctuated Equilibrium: Explaining Rapid Evolutionary Bursts Amid Long Periods of Stability
According to which evolutionary theory, there are long periods without significant evolutionary changes interrupted by short episodes of rapid evolution? (1) Saltation (2) Punctuated equilibrium (3) Mutation (4) Neutrality […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
How Long-Term Selective Breeding Increases Oil Content in Corn: Genetic Mechanisms and Hypotheses Explained
In an experiment that has continued for more than 50 years, corn has been propagated by breeding only from plants with the height amount of oil in the seeds. The […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Understanding Mutation Rates in E. coli: When Is the Principle of Spontaneity Violated?
The rate of mutation in E. coli from lac– to lac+ are determined using medium containing lactose, as the only sole source of energy. The principle of spontaneity can be […]
