Which of the following is NOT directly related to the evolutionary history of horses

Which of the following is NOT directly related to the evolutionary history of horses (known from fossils)? punctuated equilibrium genetic drift random mating variation in natural populations grass E. The basics of frequency-dependent selection: – sexual selection when there are more females than males females choose males with the rarest traits fitness measured by the number of offspring to survive sometimes drift can occur in large populations the success of your strategy depends on how common are other phenotypes in the Population F. Which of the following is NOT a type of parental investment? putting yolk into eggs fighting to get to females to fertilize eggs feeding offspring – defending safe places for females to nest sitting on eggs to provide heat for development