Question

1. if the number of nitrifying bacteria decreased what effect would this have on the nitrogen cycle and what type of compounds would accumulate as a result? 14. plants and animals (and all other living things) are part of all the natural cycles through food chains and food webs. name the four classes of carbon - containing molecules used by living things, and explain how the nitrogen and carbon cycles contribute to the usable supplies of these macromolecules.

Explanation:

13.

Nitrifying bacteria convert ammonia to nitrites and then to nitrates. A decrease would slow the conversion, causing ammonia to accumulate as the conversion to nitrites and nitrates is hindered, disrupting the nitrogen - cycle.

The four classes of carbon - containing molecules are carbohydrates, lipids, proteins, and nucleic acids. The carbon cycle provides carbon for their synthesis. The nitrogen cycle provides nitrogen for proteins and nucleic acids. In the carbon cycle, carbon is exchanged between the atmosphere, biosphere, etc. In the nitrogen cycle, nitrogen is fixed, nitrified, and assimilated by living organisms for building macromolecules.

Answer:

The nitrogen cycle would be disrupted as the conversion of ammonia to nitrites and nitrates would slow down. Ammonia compounds would accumulate.

14.