Among the following the living fossil is- (1) Ginkgo biloba (2) Taxus bacata (3) Psilotum (4) Nepenthes khasiana Introduction The term living fossil describes an organism that has remained morphologically similar to […]
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
How Horizontal Gene Transfer Interferes with Sequence-Based Phylogeny
Which of the following processes interferes in sequence-based phylogeny? (1) Horizontal gene transfer (2) Adaptive mutations (3) DNA repair (4) Reverse transcription How Horizontal Gene Transfer Interferes with Sequence-Based […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Which Organism Is a Living Fossil? Understanding the Concept and Identifying the Right Example
Among the following the living fossil is- (1) Trilobite (2) Peripatus (3) Archaeopteryx (4) Dinosaurs Introduction The term living fossil is both fascinating and often misunderstood. It refers to living organisms that […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
How to Match Organisms with Their Conservation Status: A Guide for Students
Match the organisms in column A with their status in Column B. (1) A, C are X; B, D are Y (2) A, D are X; B, C are Y […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
How Many Rooted Trees Can Be Formed with Five Taxa? Understanding Phylogenetic Tree Calculations
The table below shows the number of unrooted and rooted trees generated when the number of taxa are three and four, respectively. Number of taxa Number of unrooted trees Number […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
What Are Living Fossils? Definition, Characteristics, and Correct Statements
Given below are statements on “living fossils’. Select the correct statements. (1) Living fossils are impressions of extant organisms in old rocks. (2) Living fossils show high morphological divergence from […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
How Multi-Gene Families Evolve: The Role of Duplication and Unequal Crossing Over
Evolution of multi-gene family occurs by (1) only gene duplication. (2) only unequal crossing-over. (3) random mutations. (4) both duplication and unequal crossing over. How Multi-Gene Families Evolve: The […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Why Did Snakes Lose Their Limbs? The Evolutionary Science Behind Limb Loss
During evolution the limbs of snakes were lost. Thecorrect explanation for this is (1) Limbs degenerated due to disuse (2) This was more adapted (3) Limbs reduced the fitness of […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Why Convergent Evolution Is Most Unlikely for Gene Base Sequences
For which, of the following characters, convergent evolution is most unlikely? (1) Locomotor organs. (2) Secondary metabolites. (3) Conditionally expressed genes. (4) Base sequence of a gene. Why Convergent […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Pelvic Girdle and Hind Limbs in Pythons: A Classic Example of Vestigial Organs
Pelvic girdle and hind limbs in python are example of- (1) Analogous organ (2) Homologous organ (3) Vestigial organ (4) Orthologous organ Introduction The python, a member of the snake […]
