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 […]
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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 […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Why Population Is the Smallest Unit That Can Evolve: Unraveling the Basics of Evolution
Smallest unit which can evolve is- (1) Individual (2) Species (3) population (4) Gene What Is a Population? A population is a group of individuals of the same species living in […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
The Primary Cause of Variation Among Individuals in a Population: The Role of Mutation
The primary cause of variation among different individual in population is presence of (1) Recombination (2) Mutation (3) Multiple alleles (4) Hybridization What is Genetic Variation? Genetic variation refers […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Debunking Myths: What Antibiotic Resistance Teaches Us About Natural Selection
Examples of antibiotic resistance highlight important features of natural selection. Which of the following statements is NOT true? (1) Evolution by natural selection is progressive, it makes individuals ‘better’. (2) […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Understanding Positive Frequency-Dependent Selection: When Fitness Favors the Common
Which one of the following statements is TRUE for positive-frequency dependent selection? (1) Fitness of a genotype increases as it becomes less common. (2) Fitness of a genotype increases as […]
