If phosphorus concentrations were to suddenly increase in a marine ecosystem, which of the following would likely occur?

A) no change in the rate of primary productivity

B) increased primary productivity

C) decreased primary productivity

What is the pattern to plate boundaries

What is the capital of Saudi Arabia?

Which of the following statements about Australia is NOT true? A. Australia is the world's flattest continent. B. Dozens of powerful rivers cross the continent. C. A dry plateau is located west of the Great Dividing Range. D.

Why do plants have nodules on the roots?

River flows from germany to hungary to the black sea

What is an ecosystem?

Which region consists of a central place and the surrounding places affected by it?

Which statement about the economy of France is not true? Paris is a major manufacturing center. Marseille is a busy seaport on the Mediterranean coast. Farming is the major activity in the Alps. World-famous wines are produced in the Bordeaux region.

What is agreed upon by scientist as the most likely cause of the final extinction for the dinosaurs?

As a result of a mountainous terrain, all of the following occurred except: A independent Greek city-states arose B large empires developed C trade and outdoor markets developed D outdoor civic life flourished