Darwinism refers to the theory of evolution by natural selection, originally proposed by Charles Darwin. It suggests that organisms with traits better suited to their environment are more likely to survive and reproduce, passing these beneficial traits to their offspring. This process leads to gradual changes in populations over time, […]
Neolamarckism is a modern interpretation and modification of Lamarck’s theory of evolution. While it acknowledges the inheritance of traits acquired during an organism’s lifetime, it incorporates the idea that epigenetic factors play a role in the inheritance of such traits. Neolamarckism blends Lamarck’s original concepts with newer scientific findings, particularly […]
Reproductive isolation refers to mechanisms that prevent different species or populations from interbreeding and producing viable offspring. It is crucial for maintaining species boundaries and promoting speciation. Reproductive isolation can occur through prezygotic or postzygotic mechanisms, leading to the formation of new species over time. This is an MCQ on […]
Genetic variability refers to the diversity in gene frequencies within a population, which leads to differences in the genetic makeup of individuals. It plays a crucial role in evolution, as it provides a foundation for natural selection to act upon. Genetic variability can arise through mutations, gene flow, sexual reproduction, […]
Adaptive radiation is the process by which a single ancestral species rapidly diversifies into a wide variety of forms to exploit different ecological niches. This phenomenon occurs when new environmental opportunities arise, such as the colonization of new habitats or the extinction of competitors. Adaptive radiation often results in the […]