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 […]
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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 […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Convergent Evolution: How Analogous Structures Arise in Nature
Convergent evolution creates: (1) Analogous structures (2) Homologous structures (3) Synapomorphies (4) Pleiotropic structures Introduction Evolution is a powerful force shaping the diversity of life on Earth. One of its […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
The Phylogenetic Species Concept: Defining Species with Morphological and Molecular Evidence
Which species concept utilizes morphological and molecular characters to distinguish between species? (1) Evolutionary (2) Ecological (3) Biological (4) Phylogenetic The Phylogenetic Species Concept: Defining Species with Morphological and […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Convergent Evolution Explained: Why Bird and Bat Wings Are a Classic Example of Homoplasy
Which of the following is an example of convergent evolution (homoplasy)? (1) The wings of birds and bats (2) The hemoglobin gene family (3) The ribosomal RNA genes (4) The […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Fossils of the Same Freshwater Reptile in South America and Africa: The Gondwana Connection Explained
Fossils of the same species of fresh water reptiles have been found in South America and Africa. Based on the current understanding. Which of the following is the best possible […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Gene Cluster Evolution: Why Exon Shuffling Alone Can’t Explain Mayfair Gene Patterns
Mayfair genes (HYPOTHETICAL) consist of a superfamily of transcription factors. They are found in 4 clusters in mammals; in 2 clusters in insects; and in a single cluster in an […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Why Tigers Are Absent in Sri Lanka but Leopards Thrive: An Evolutionary and Biogeographical Perspective
Tigers do not occur in Sri Lanka while they are seen India. While the leopards are seen in both India and Sri Lanka. The main reason is (1) Tigers are […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Biased Gene Conversion: Myths and Facts About Its Role in Genome Evolution
Biased gene conversion (BGC) has been proposed to cause changes in allele frequencies in a population. Select the statement that is NOT correct about BGC. (1) BGC is present in […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
: Why Are Ostriches, Rheas, and Emus Found on Different Continents? The Evolutionary Biologist’s Explanation
The flightless birds ostrich, rhea and emu are distributedon different continents. What is the most plausibleexplanation that is given by an evolutionary biologist for this discontinuous observation? (1) The birds were […]
