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

Which continent has moved the farthest away in 250 million years? Which has most the least

Where does makes livestock and crop farming predominately occur

What are the types or categories for galaxies

What was the basis for the growth of great Zimbabwe

Where would the rock sample shown be found in the diagram below?

Earth is a closed system. that means the amount of rocks, metals, carbon, nitrogen, oxygen, and water on earth ___. so it is essential that bio geochemical cycles __ these materials as they move through earths subsystems A: remains constant.

What are the percentages of the large near Earth asteroids that we have found so far?

Name the lines of latitude that are labeled north of the equator what would be the next label after 75 degrees north

Why did the ancient Chinese believe that they were the center of the universe? O The arrival of traders from other lands made them an important civilization. O The people of ancient China lacked a basic education in world geography.

Distance that the transcontinental railroad covered from Omaha to San Francisco.