GUYS I NEED HELP WITH THIS AS SOON AS POSSIBLE PLEASE ANSWER HERE IS THE QUESTION: (MAKE IT LOWER LEVEL ANSWERS LIKE MIDDLE SCHOOL 7TH GRADE) Explain why the nitrogen cycle is so vital to the life of all organisms.
(DO NOT LOOK IT UP ON GOOGLE PLEASE SEE SOME ARTICLES AND READ THROUGH WEBSITES DO NOT GET IT FROM GOOGLE)

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

What is the primary goal of human communities?

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10