Environmental microbiology

Question 1

What are biotic and abiotic factors

Answer 1

1. Biotic factors are dead or living organsims
2. Abiotic are non living components such as H20, light, temp, atmospheric gases and minerals
3. Element are cycled between the biotic and abiotic

Question 2

What happens in the carbon cycle?

Answer 2

1. CO2 goes to the plant for photosynthesis and the animal eat off the plant and breathe it out
2. CO2 goes to the ocean via sedimination makes CaCO3 limsteone and shells
3. Animals and plants become decomposed and it goes to fossil and fossil covert to fuel such as oil coal and gases which are used for combustion (car)
4. The car release via pollution the CO2 out again and the cycle starts again

Question 3

What happens in the nitrogen cycle?

Answer 3

1. Nitrogen goes to the soil via rain or snow and it finds bacteria on the plant
2. Nitrogen binds to hydrogen on the plant maiking ammonia via nitrogen fixation
3. Ammonia binds with o2 via nification making nitrites, nitrites nitry the bacteria making nitrates which are absorbed by the plants by assimilation or it goes to the atmosphere by de-nitrying bacteria