Evolution and Origin of Life — NEET Biology
📚 Practice ConceptEvolutionary Biology is the study of history of life forms on earth. What exactly is evolution? To understand the changes in flora and fauna that have occurred over millions of years on earth, we must have an understanding of the context of origin of life, i.e., evolution of earth, of stars and indeed of the universe itself. What follows is the longest of all the contrived and conjectured stories. This is the story of origin of life and evolution of life forms or biodiversity on planet earth in the context of evolution of earth and against the background of evolution of universe itself.
Which of the following statements are correct regarding evolution as a process and its underlying mechanisms? S1: Evolution is primarily understood as a process involving gradual changes in life forms over millions of years, driven by natural selection. S2: The rate of appearance of new forms is generally independent of the life cycle or life span of the organism. S3: Evolution by anthropogenic action, such as the overuse of antibiotics, demonstrates that evolution is a directed process. S4: When describing the story of life on earth, evolution is considered a consequence of the process called natural selection. S5: Disturbances in Hardy-Weinberg equilibrium, such as gene flow or genetic drift, can lead to evolutionary change.
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