The two phylogenetic trees given below represent evolutionary patterns in species or population. The differently colored or dashed lines represent a single or gene genealogy. Select the option that correctly […]
Tag: CSIR NET Life Science Previous Year Questions and Solution on Molecular Evolution
CSIR NET Life Science Previous Year Questions and Solution on Molecular Evolution
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CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Understanding UPGMA Trees: Key Properties and Applications in Phylogenetics
The following statements were made describing the properties of a UPGMA tree (Unweighted Pair Group Method with Arithmetic Mean): A. It describes species relationships and is therefore the best method […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Clarifying the Use of Genes in Plant Molecular Systematics: Myths and Facts About mtDNA, cpDNA, and rDNA
Given are some statements with reference to the use of genes in plant molecular systematics. A. mtDNA are not preferred over cpDNA or rDNA because they generally show slow rate […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Maximum Parsimony in Cladograms: Identifying Equally Most Parsimonious Trees
In the cladograms given below each nucleotide change is indicated by a black bar Which one of the following options represents two equally most parsimonious trees? (1) A and B […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Horizontal Gene Transfer: The Key to Conflicting Phylogenetic Trees in the Tree of Life
When James R Brown and W Ford Doolittle (1997) reconstructed the tree of life using a variety of different genes, they found that different genes gave fundamentally different phylogenies as […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Decoding the Evolutionary Relationships Among Bacteria, Archaea, and Eukarya: Insights from Phylogenetic Trees
In the phylogenetic tree above, branch-lengths are drawn proportional to the number of changes along a lineage. The following inferences were made from this tree. (A) Bacteria are more closely […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Parsimony and the Evolution of Male Body Color in Species: Decoding Ancestral States
The phylogenetic tree below shows evolutionary relationships among 8 species. Males of these species are either blue (b) or red (r) in colour, the colour being indicated next to each […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Using Parsimony to Infer Ancestral Plumage Color in Birds: Red or Blue at the Root?
The phylogeny below shows evolutionary relationships between 9 extant bird species and whether they display red or blue plumage. Based on the above phylogeny and the distribution of red and […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Tracing the Evolution of Eye Spots in Moths: Losses, Gains, and Ancestral States
Following tree represents phylogenetic relationships among species of a moth family. Circles represent species having eye spots on the wings. Other species do not have eye spots. The following interferences […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Nuclear Genome: The Most Reliable Marker for Detecting Hybrids in Plants and Animals
Which one of the following genomes is most appropriate to determine hybrids in plants and animals? (1) Nuclear (2) Mitochondrial (3) Chloroplast (4) Mitochondria and chloroplast Nuclear Genome: The […]
