Examine fossil records and anatomical similarities to understand how evolution is supported by scientific evidence. Includes examples from paleontology and comparative anatomy.
Vestigial gill slits in human embryos suggest common ancestry with aquatic organisms like fishes.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Gene flow reduces genetic differences between populations by introducing new alleles.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Paleontology studies fossils to provide evidence of evolutionary changes over time.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Forelimbs in whales, bats, and humans are homologous organs, indicating common ancestry despite different functions.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Coelacanth is considered a living fossil, showing little evolutionary change over millions of years.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Genetic drift, along with mutation, gene flow, and selection, disrupts Hardy-Weinberg equilibrium by altering allele frequencies.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Wings of butterfly and bird are analogous structures, performing similar functions but having different evolutionary origins.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Fossil records provide direct evidence of evolutionary changes over time.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Embryological evidence, such as similar embryonic stages, supports the concept of common ancestry among species.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Analogous organs have similar functions but different structures and evolutionary origins.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Hardy-Weinberg equilibrium remains stable only when no evolutionary forces are acting on a population.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
Thorns of Bougainvillea and tendrils of Cucurbita are homologous structures derived from the same ancestral organ but adapted for different functions.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy
