Ecosystem Set 3 - ilmijazeera

Results

#1. Nitrogen is vital to plants and animals for the synthesis of:

Sucrose

Proteins

Fructose

Waxes

#2. Which of the following is the source of soil nitrates?

#3. Nitrification is the conversion of:

Nitrates into ammonia

Ammonia into nitrates

Nitrates into free nitrogen

Amino acids into ammonia

#4. Nitrosomonas converts:

Ammonia to nitrites

Ammonia to nitrates

Amino acids to ammonia

Ammonia to amino acids

#5. Nitrification takes place in:

Anaerobic condition

Aerobic Condition

Not affected by any of the above conditions

All of these

#6. Which one of the following is concerned with non-symbiotic nitrogen fixation?

Nitrobacter

Rhizobium

Closteridium

Nitrosomonas

#7. Denitrifying bacteria converts:

Nitrites into nitrates

Ammonia into nitrates

Free nitrogen into nitrates

Nitrates into free nitrogen

#8. Which of the following concerned with denitrificaiton?

Pseudomonas

Nitrosomonas

Nitrobacter

Nostoc

#9. Consider the following:I. Nitrification II. Nitrogen fixation III. Denitrification IV. Thunderstorm Which one of the following groups increase soil fertility?

I, III & IV

I, II & IV

II, III & IV

I, II & III

#10. Energy flow in the ecosystem is:

Cyclic

Two directional

One directional

Not needed

Finish