Question

1. estuaries are extremely productive ecosystems because they continually receive fresh nutrients from ____ and ____. mark only one oval. a. rivers, oceans b. lakes, ponds c. marshes, swamps d. streams, springs

how long till theyre gone? estimated time taken to biodegrade

1. 17. according to the graph above, if all 5 of the items found in the graph were placed in the same location at the same time, how long would it take for all of them to have completely biodegraded? mark only one oval. 50 years 600 years 1750 years 450 years

Explanation:

Estuaries are productive as they get nutrients from rivers and oceans. For the biodegradation - time question, the longest - time item (fishing line taking 600 years) determines when all items will be completely biodegraded.

Answer:

1. A. rivers, oceans
2. 600 years