What variables can affect the performance of a marathon runner?

Explanation:

There are a wide range of variables that can effect a marathon runner such as

Physical Fitness State

Mental Health State

Endurance levels

Weather

Environment

Hidration levels

etc.

As seen by the list above there are countless variables that can affect a marathon runner, the two main ones being their Physical and Mental Health state. If a runner is not physically prepared for a race then their body can easily turn on them and they can suffer from muscle cramps, fatigue, fainting, etc. While at the same time, if the runner is not mentally prepared for a race they can quickly lose interest and the desire to win/finish which are crucial.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation:

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.