Sailfin Cattish
9. Explain how the introduction of the Sailfin Catfish to a new ecosystem can have a negative impact on
food web. Explain why the Sailfin Catfish population has been so successful in the Everglades ecosystem.

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.

condenser is used to focus in the light microscope.