Semester 1 Final

Question 1

Nitrogen fixation

Answer 1

Converts N2 from the atmosphere. Biotic process converts N2 to ammonia (NH3) whereas abiotic processes convert N2 to nitrate (NO3-)

Question 2

Nitrification

Answer 2

Nitrifying bacteria convert ammonium (NH4+)into nitrate (N)2-) and then into nitrate (NO3-)

Question 3

Assimilation

Answer 3

Plants and algae take up either ammonium or nitrate.
Herbivores assimilate nitrogen by eating plants and algae

Question 4

Mineralization/Ammonification

Answer 4

Decomposers in soil and water break down biological nitrogen compounds into ammonium

Question 5

Dentrification

Answer 5

A series of steps, denitrifying bacteria in oxygen - poor soil and stagnant water convert nitrate into nitrous oxide and eventually nitrogen gas

Question 6

Mutualism

Answer 6

A interaction between two specific species that increase the chances of survival o reproduction for both species. Both benefit from the interaction.

Question 7

Parasitism

Answer 7

An interaction where one organism lives on another organism, consuming a small fraction of the hose in order to keep it alive (Winner + looser)

Question 8

Commensialism

Answer 8

An interaction between two species in which one species benefit and the other species is neither harmed nor helped