10 public questions tagged with this topic.
Human skin color is a polygenic trait influenced by multiple genes, leading to a continuous range of skin tones.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Polygenic Inheritance Pleiotropy and Quantitative Inheritance
Polygenic inheritance involves multiple genes contributing to a single trait, such as skin color and height.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Polygenic Inheritance Pleiotropy and Quantitative Inheritance
Mendel studied traits such as seed color, pod shape, and flower position but not leaf venation.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Mendel's Laws - Dominance Segregation Independent Assortment
Amphibians lay non-shelled eggs, typically in water, unlike reptiles and birds, which lay shelled eggs.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Amphibia and Reptilia
Species is the lowest category among the given options. Members of lower taxa share more common characteristics than members of higher taxa.
Ref: NCERT Class 11 Biology Chapter 1: The Living World What is Living? Characteristics of Living Organisms
Members of lower taxa share more characteristics. As one moves from species towards kingdom, the number of common characteristics decreases.
Ref: NCERT Class 11 Biology Chapter 1: The Living World What is Living? Characteristics of Living Organisms
Convergent evolution occurs when unrelated lineages independently evolve similar traits due to similar environmental pressures, such as wings in birds and bats or streamlined bodies in dolphins and sharks, resulting in analogous structures with similar function but different ancestry. It reflects adaptation to common niche, not common descent, and can mislead phylogeny as homoplasy. Divergent evolution produces homologous structures. Hence Analogous structures results from convergence producing analogy. This concept integrates genetics, ecology and molecular evidence, frequently tested in NEET, GATE and CSIR-NET, highlighting links between genotype, phenotype and environment.
Ref: Futuyma, Evolution, Variation, Drift, and Speciation Concepts.
Hair in mammals reflects key principle in quiz on cladogram+pyqs, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Hair in mammals aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Hair in mammals fits helps integrate natural selection, environment.
Ref: Baum & Smith, Tree Thinking, Synapomorphy and Monophyly.
Stabilizing reflects key principle in quiz on pyqs-evo theories + genetic drift, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Stabilizing aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Stabilizing fits helps integrate natural selection, environment.
Ref: Hartl & Clark, Principles of Population Genetics, Drift and Effective Size.
The keyed exception is “High parental care.” In the context of which of these is not a trait of r-strategists, that statement differs from the governing ecological pattern and must be evaluated against the mechanism rather than accepted from wording alone. Life-history traits reflect allocation among growth, maintenance, survival, and reproduction. Energy invested in many offspring cannot simultaneously be invested in large offspring, prolonged care, or future breeding, creating measurable trade-offs. The remaining alternatives—“High dispersal ability”, “High reproductive rate”, “Small body size”—refer to different states, processes, or scales and therefore do not express the same causal relationship. Survivorship curves summarize age-specific mortality: Type I concentrates loss late in life, Type II approximates a constant hazard, and Type III concentrates loss early. They are empirical patterns, not rigid taxonomic rules. This distinction matters because similar surface patterns can arise through different mechanisms, whereas ecological prediction depends on identifying the mechanism that actually changes rates.
Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 12
