Biochemical oxygen demanding (BOD) wastes include A) ...

[audragclark]

Biochemical oxygen demanding (BOD) wastes include
 
  A) phosphorus and nitrogen-based fertilizers.
  B) sand, silt, and clay suspended in water.
  C) fish, aquatic insects, algae and other live aquatic organisms.
  D) organic biodegradable material that requires oxygen to be decomposed by bacteria.

Question 2

If the United States or Sweden had an age structure like a developing country,
 
  A) the current social security system would fail.
  B) colleges and universities would expect declining enrollments.
  C) the educational system would need to double the number of elementary schools.
  D) the retirement age would need to be raised.

[aloop]

Answer to Question 1

D

Answer to Question 2

C

[audragclark]

Gracias!

[sultansheikh]

Excellent