Hi! Can you please make your question clearer ?
Answer:
The nitrogen cycle could not exist without first nitrogen. The cycle is about this specific element which goes to show that if this element is not present then, there will not be any nitrogen cycle. Also, an important factor for the cycle is the presence of the bacteria and other microorganism which are needed for the fixation.
It would be x and y chromosomes
Answer:
The patient may be exhibiting a blunted or absent febrile response.
Explanation:
May be the patient after being diagnosed with urinary tract infection the physician administered an antibiotics for him and he took it, which can decrease the patient symptoms.