Which of the following examples of an ecological study involves the ecosystem level of organization?

a. the effects of human activities on biogeochemical cycling
b. the effects of a disease on population size
c. the effects of an invasive plant species on bird nesting sites
d. the effects of competition on survival

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms

This class has taught you that the use of science and medicine in practical ways has become an international endeavor. one of the greatest examples of an international science accomplishment is which allows the profiling of human dna, useful not only to science but also medicine. a) forensic science b) the fbi c) the human genome project d) bioterrorism