A study on eye color was performed at an elementary school. The allele for brown eyes is dominant over the allele for blue eyes. Using the data given, what is the number of students in the 2000 sample that was taken that are heterozygous assuming the group is in Hardy-Weinberg equilibrium

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.