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Nitrogen cycle

Q1
Can you explain to me the advantage of adding a compound containing urea instead of ammonium salts to the soil.

Q2
Some non leguminous plants such as cereal sorghum, organic molecules ooze out from their roots. How could this benefit these plants in the competition for nutrients.

Q3

Why are composts rich in cellulose likely to be poor in nitrogen-containing ions.

Q4
Why do plants growing in dips look yellow and and stunted.

Thanks

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Germination Enzymes

I have been given my coursework problem regarding a restaurant owner who throws food away on a compost heap and noted that plants do not grow where spicey dishes were thrown. I cannot find any information on enzymes which affect the germination process but we are trying to follow the idea of allelopathy in that the spices emmit a substance causing enzyme inhibition preventing germination. Any help would be great! Thanks, Katy

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Diabetes

Do people of low birth weight and poor growth in infancy have greater risk of developing Type 2 diabetes? Explain your answer.

Thanks for the help.

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Explanation of the effect of ph on the active site of enzymes

I need to find the anwser to the above question and I am becoming quite confused with ph , substrate, enzymes and active sites.... Please can you help me a.s.a.p

Thankyou so much

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human insulin

hey i would very much appreciate it if you were able to tell me the benefits/advantages of using human insulin on a diabetic instead of any other insulin (?e.g from a pig)
thank you very much
cya
fats
xxx

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Caffeine

How does caffeine affect the syanpses in our body and why? and our reactions

And would decaf coffee have the opp affect?

-How would sugar affect the synases and our reactions and why?

Thankz!


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Effect of light and shade on stinging nettle growth rates

Hello, I have just returned from a biology field trip where I studied stinging nettles (u.d). I compared nettles in partial shade to those in an unshaded region. Nettles were much taller in the shade, to those not in the shade, and comparisons of internode lengths (from top leaf to second leaf down), between the shaded and unshaded nettles showed shaded nettles to have longer internodes. Does this indicate that nettles have faster growth rates in the shade? And if so, then WHY exactly do they grow quicker in the shade?
Any reply would be very, very helpful, and any possible info. on books I could buy on this topic would also be great.
Thankyou XXX

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test for albumen

Why did I get a white precipitate upon adding 1-naphthol to albumen and then carefully pouring concentrated sulphuric acid down the sides of the test-tube?

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Reaction Time

I m suppose to do my coursework on Reaction Time, I have to investigate if caffin have an effect on individuals reaction rate, such as the time it took a person to catch a ruler when it's dropped. And i have problem on the theory part of this project, does caffin effect how fast a person react?

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why are lichens sensitive to acid

hi, im doin gsome coursework on lichens, i was wondering if you could help me, i know lichens are very sensitive to acid, i also know direct contact to substances such as sulpur dioxide causes damage to the chloroplasts and mitochondria which leads to the thylakoid and mitochondrial cristae become swollen, leading to chlorophyll being destoyed and photosynthesis becoming inhibited, but i really want to know what the biology is behind this, why do the thylakoid and mitochondrial cristae become swollen? i would like to be as detailed in my explanations as possible.
thanks

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Chanel Le Boy Bolsas:

December 17, 2014 | A Level Biology Coursework
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Difficulty: Easy | Reward: 2 SZPoints

Status: Unanswered | Comments: 0

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Christian Louboutin outlet

November 4, 2014 | A Level Biology Coursework
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Difficulty: Very Hard | Reward: 12 SZPoints

Status: Unanswered | Comments: 0

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MBT Sandalias Mujer: mbt.me.uk

November 4, 2014 | A Level Biology Coursework
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Difficulty: Easy | Reward: 2 SZPoints

Status: Unanswered | Comments: 0

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???? ????? ??? ??????

September 29, 2014 | A Level Biology Revision
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Difficulty: Hard | Reward: 6 SZPoints

Status: Unanswered | Comments: 0

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Factors that cause the rate of osmosis to increase

September 25, 2008 | A Level Biology Homework
Contributors:
sarah lilly sofa sofa David malak

Difficulty: Average | Reward: 3 SZPoints

Status: Answered | Comments: 6

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Statistics... =(

August 31, 2008 | A Level Biology Coursework
Contributors:
lilly shamim

Difficulty: Average | Reward: 3 SZPoints

Status: Answered | Comments: 2

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biology A2 coursework

August 26, 2008 | A Level Biology Coursework
Contributors:
shamim

Difficulty: Hard | Reward: 6 SZPoints

Status: Answered | Comments: 1

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yeast respiration

August 19, 2008 | A Level Biology Homework
Contributors:
anton malak

Difficulty: Average | Reward: 3 SZPoints

Status: Answered | Comments: 2