The conversion of nitrate to nitrogen gas is achieved by bacteria. select one: a. denitrifying b. leguminous c. nitrogen-fixing d. nitrate-producing e. nitrite-producing

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

What is the correct term for an area of rotating currents in an ocean? when ocean currents combine, they create an area of rotating currents called an

How does the carbon cycle involve an exchange of carbon