Imagine that you are a marine biologist and you notice that a certain type of crab tends to be considerably smaller in a local bay than the same type of crab is in the water outside the bay. What hypothesis might account for this difference? How would you go about testing this hypothesis?

go to google then look it up

Explanation:

See how annoying this is? If you're going to answer someone's question, give an actual answer.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.