River Mccormick

Biology

2 April, 16:25

1. The nutrient availability of aquatic ecosystems is the?

amount of nitrogen, oxygen, and other elements dissolved in the water.

number of other organisms present in the water.

amount of rainfall the water receives.

number of different animal species living in the water.

2. Freshwater ecosystems that often originate from underground sources in mountains or hills are?

estuaries.

rivers and streams.

lakes and ponds.

wetlands.