Fossils and genes are used to determine? Is the answer how species will change over time?

No, the correct answer is the evolutionary relationships between different species. Fossils provide evidence of past organisms and help to reconstruct the history of life on Earth, while genes offer information about the genetic similarities and differences between species, allowing scientists to determine their evolutionary relationships. However, neither fossils nor genes can predict with certainty how species will change over time. Evolution is influenced by numerous factors, including natural selection, genetic variation, and environmental changes, making the future trajectory of species difficult to predict definitively.