The variations in individuals that lead to evolution are because of differences in:
Correct answer: A. Genes
- A. Genes
- B. Anatomy
- C. Physiology
- D. Acquired characters
Explanation
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. It is considered the basic unit of inheritance and the genetic variations lead to evolutionary process.Genes drive evolutionary change through mutation, which introduces new gene variations (alleles), and through mechanisms like natural selection and genetic drift, which change the frequency of these alleles in a population over generations. Sexual reproduction and gene flow further shuffle and introduce new genetic combinations, creating the variation necessary for populations to adapt and change over time.
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About Concept of Evolution
Evolution is the heritable change in populations over generations, driven by mutation, recombination, natural selection, genetic drift and reproductive isolation. Questions examine variation, adaptation, survival and reproduction, speciation, fossil and anatomical evidence, and the difference between individual acclimatization and evolutionary change in a population.
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