All of the listed human actions affect the nitrogen cycle with the exception of the a) use of agricultural fertilizers. b) runoff of pesticides into streams and lakes. c) production of sewage and animal wastes from farms. d) removal of soil bacteria from irrigation or construction.

The correct answer is option B) runoff of pesticides into streams and lakes.

Explanation:

The nitrogen cycle is the process in which atmospheric nitrogen is fixed to the soil naturally. Agriculture fertilizer is help in adding nitrogen to the soil directly that affect the nitrogen cycle positively.

The nitrogen cycle also affected by the waste and sewage farming as it produces the nitrogen by the process of decomposing. this is also affecting the nitrogen cycle positively. Removal of the bacteria from the soil by irrigation also affects the nitrogen cycle.

Thus, the correct answer is option B) Runoff of pesticides into streams and lakes.

the endocrine system secretes hormones into blood and other body fluids. these chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. hormones provide feedback to the brain to affect neural processing. reproductive hormones affect the development of the nervous system.

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.