Evolution is a frequently debated topic in the science field. The theory of evolution helps us to understand how organisms on Earth have changed over time. Richard E. Lenski, author of Evolution: Fact and Theory, emphasizes that although evolution is a theory, scientists have discovered a great deal of evidence for evolution. DNA and genetics are the foundation of all life. All organisms contain DNA from their parents and no two organisms have the same genes. Our genetics determine our looks and behaviors. As living creatures evolve or leave their natural habitat they use their unique features(provided by DNA) to adapt to their surroundings. For example, when humans become overheated, they sweat and when the become cold, they shiver. One type of adaption is natural selection. In natural selection, some organisms adapt to their surroundings by hiding or outsmarting predators, using resources, and working with other organisms. A result of natural selection is an increase of offspring, which leads to an increase in the population of specific species.
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Fossils are our main source of evidence that evolution has occurred. According to Richard E. Lenski, “fossils are the mineralized remnants or impressions of once living organisms.” Today’s people learn of the species that once lived on Earth by examining and studying the remains of creatures. Whether it be that reptiles are the ancestors of birds or that there once was an aquatic dinosaur, every time a new fossil is discovered, we learn something new about the
Fossils are our main source of evidence that evolution has occurred. According to Richard E. Lenski, “fossils are the mineralized remnants or impressions of once living organisms.” Today’s people learn of the species that once lived on Earth by examining and studying the remains of creatures. Whether it be that reptiles are the ancestors of birds or that there once was an aquatic dinosaur, every time a new fossil is discovered, we learn something new about the