Fresh-water ecosystems consist of ponds, streams, rivers, lakes, wetlands, and aquifers. Which of the following BEST describes these ecosystems?
A: low salt content, no photosynthesis.
B: low salt content, surrounded by land.
C: high salt content, high photosynthesis.
D: high salt content, surrounded by land.
1 answer
B: low salt content, surrounded by land.
1 answer