In aquatic ecosystems with high concentrations of dissolved nutrients, increases in the decomposer population ultimately decrease the amount of dissolved oxygen in the water. This change most likely
results in
A- increases in photosynthetic bacteria in aquatic ecosystems.
B - increases in the biodiversity of aquatic ecosystems.
C -decreases in the carrying capacity for primary consumers in aquatic ecosystems.
D - decreases in competition between organisms in aquatic ecosystems.

i dont know this but ask your teacher for !

when it is at an intermediate population density

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.