Which method will most accurately determine the diversity of an ecosystem ?
a. verify the keystone species, and identify which species depend on it.
b. count the number of species, and determine their relative abundance
c. weigh all the the species, and measure they total biomass
d. determine what each species eats, and identify its place in a food web

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.