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 […]
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 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 […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Debunking Evolution Myths: Is Evolution Goal-Oriented?
Which of the following statements about evolution is NOT true? (1) Evolution is the product of natural selection. (2) Evolution is goal-oriented. (3) Prokaryotes evolve faster than eukaryotes. (4) Evolution […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Microevolution: The Process Behind Changes in Allele Frequency at or Below the Species Level
Change in allele frequency at species or below species level is termed as (1) Microevolution (2) Macroevolution (3) Mega evolution (4) Silent evolution What Is Microevolution? Microevolution refers to the […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Predicting Lac Mutant Frequencies in E. coli: What Happens Under Constant Mutagen Exposure?
If E. coli is grown on lactose free medium for 20 generations under presence of constant mutagen which produces the lac– mutants as well as lac– revertants in equal amount. […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Mutation: The Essential Force Driving Variation and Evolution
Which is essential for bringing variation and evolution? (1) Mutation (2) Reproduction (3) Mitosis (4) Genetic drift What Is Mutation? A mutation is a change in the DNA sequence of an […]
