In cattle, there is an allele called dwarf (D) which, in the heterozygous genotype, produces calves with legs that are shorter than normal. Cattle with normal-size legs have the genotype (dd). If a “dwarf” bull is mated to a “dwarf” cow, what fraction of the living offspring would one expect to have normal length legs

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.