BIOL4 Biology Unit 4 Exam - 13th June 2011

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Be careful here. Chemical pesticides aren't very specific as they can have an effect on non target species. Whereas Biological agents are specific.

oh yeah got mixed up there ha!

Reply 461

INeedToRevise

Original post by User12399

surely some of the basic ones like % changes you can do from KS2 and rate of change. Also birth rate and death rate is just a calculation using common sense.

I thought it would be helpful to have a list on here. I'm sure some people will appreciate it. Not everyone remembers things from KS2 lol.

EDIT: Looks like it is helpful since its been +verepped.

(edited 12 years ago)

Reply 462

Thepupil

Question : What's the advantages of using inorganic nitrogen fertiliser rather than an organic fertiliser apart from its more easily taken up because it's in it pure form, not in urea/manure form?

Reply 463

User12399

Original post by Thepupil

Question : What's the advantages of using inorganic nitrogen fertiliser rather than an organic fertiliser apart from its more easily taken up because it's in it pure form, not in urea/manure form?

you know its content of nutrients, easy to apply and doesn't wash away as easily, fast acting, can be applied evenly, can be applied using light machinery, reduce soil compaction, easy to store.

Reply 464

likedylaninthemovies

Does anyone have Jan 11 paper? Feeling sick about tomorrow...

Reply 465

Master.K

Advantages and Disadvantages or Natural and Artificial fertilisers? (Organic/Inorganic)

Reply 466

Thepupil

Original post by User12399

you know its content of nutrients, easy to apply and doesn't wash away as easily, fast acting, can be applied evenly, can be applied using light machinery, reduce soil compaction, easy to store.

Cheers mate +repped.

Reply 467

User12399

Original post by Master.K

Advantages and Disadvantages or Natural and Artificial fertilisers? (Organic/Inorganic)

Advantages of Artificial

Fast action
Components known
Easy to store/apply
Can apply with light machinery
High nutrient content

Disadvantages
Very soluble
Can cost quiet a bit

Natural

Advantages

Cheap

Disadvtages

Can effect water courses (leeching)

(edited 12 years ago)

Reply 468

BioFurMatPhyStudent

Original post by likedylaninthemovies

Does anyone have Jan 11 paper? Feeling sick about tomorrow...

http://www.thestudentroom.co.uk/showthread.php?p=30386735#post30386735

Reply 469

INeedToRevise

Original post by User12399

Pretty immature neg repping me when I'm trying to helping others.

Reply 470

User12399

Original post by INeedToRevise

Pretty immature neg repping me when I'm trying to helping others.

mate, i didn't neg you.

Reply 471

INeedToRevise

Original post by User12399

mate, i didn't neg you.

Well who is on here neg repping everyone?
BTW it probably looks like I neg repped you but I didn't.

Reply 472

Master.K

Original post by User12399

Repped!

Reply 473

empop92

i reckon the end 5 markers might be photosynthesis or respiration... there was not much on the january paper which annoyed me! only thing i can do well haha

Reply 474

User12399

Original post by INeedToRevise

Well who is on here neg repping everyone?
BTW it probably looks like I neg repped you but I didn't.

don't know but i've +repped you couple of times today so its saying "Please rate some other members before rating this member again." lol

I'm not bothered about rep just the fact i'm learning while helping others. best way to learn

Reply 475

Jackbruce

So what 3 5 markers do you think people?

I really think eutrophication
perhaps colonisation or something.

Reply 476

Stratos

Original post by empop92

i reckon the end 5 markers might be photosynthesis or respiration... there was not much on the january paper which annoyed me! only thing i can do well haha

My guess is succession of bare rock, perhaps something to do with deflected succession in there.

I'm pretty confident on my respiration/photosynthesis so I'm concentrating on the ecology section of it mainly. So just to make sure will it be fine to use the terms nitrifying bacteria instead of the specific bacteria involved the same for denitrifying bacteria?

(edited 12 years ago)

Reply 477

User12399

My predictions:

Photosynthesis
Carbon Cycle
Nitrogen Cycle
Conservation
Use of fertilisers and the consequences
(Also some Inheritance but doubt it, came up in jan)