Biology paper 3

[Yousif Mukkhtar]

what is the deanimation process ??

It is a process taking place in the liver where the nitrogen containing part of of the amino acid is converted to urea and the remaining part is used to produce energy.

 

[Maz]

First of all, ATP is Adenosene Triphosphate. It is the basic source of energy, so during respiration energy is released in the form of ATP. ATP can be used for storing and releasing energy. When energy is released, one phosphate molecule is removed from the ATP so it is called Adenosene disphosphate. ATP can also be used to store energy, by adding a phosphate ion to the Adenonese diphosphate giving you ATP (Adenonese triphosphate)

If that wasn't clear read:
ATP is a source of energy
It can be used to store energy when one phosphate ion is added to Adenonesene diphosphate which gives ATP.
ATP can release energy by releasing a phosphate ion.

Thanx

 

[whitetiger64]

I hope im nt asking too much here, but can anyone plz clearly state the jobs of oestrogen, progestroen, FSH and LH. I mean evry txtbk ive been through has it in one big paragraph so it's lyk really confusing!

 

[dana xP]

I hope im nt asking too much here, but can anyone plz clearly state the jobs of oestrogen, progestroen, FSH and LH. I mean evry txtbk ive been through has it in one big paragraph so it's lyk really confusing!

*FSH- #it stimulates the follicle to grow into graafian follicle,that secretes oestrogen
#it gives nourishment to the ovum to mature
#it prevents further follicle stimulation by becoming low after ovulation

*LH - #it helps in ovulation
#converts the remains of the follicle to a corpus luteum
#corpus luteum produces progestron that thickness the lining of the uterus and establish pregnancy

 

[Yousif Mukkhtar]

I hope im nt asking too much here, but can anyone plz clearly state the jobs of oestrogen, progestroen, FSH and LH. I mean evry txtbk ive been through has it in one big paragraph so it's lyk really confusing!

LH:
-Stimulates release of mature ova
-Stimulates development of corpeus luteum

FSH:
-Stimates development of graphian follicle

Oestrogen:
-Repairs uterus lining

Progesterone:
-Maintains uterus lining during pregnancy
-Prepares uterus lining to accept a zygote
-Prevents release of FSH

 

[Maz]

1)Oestrogen - helps in rebuilding of the uterus linig.
-controls develpoment of secondary sexual characterestics.
2)LH- Triggers ovulation.

3)FSH- Maturing of the follicle.
- Stimulates ovaries(or follicle .Not sure) to release oestrogen.
- Afterovulation, level falls to prevent further ovulation.

4)Progesterone - Prevents uterus lining from breaking down.

 

[whitetiger64]

*FSH- #it stimulates the follicle to grow into graafian follicle,that secretes oestrogen
#it gives nourishment to the ovum to mature
#it prevents further follicle stimulation by becoming low after ovulation

*LH - #it helps in ovulation
#converts the remains of the follicle to a corpus luteum
#corpus luteum produces progestron that thickness the lining of the uterus and establish pregnancy

1)Oestrogen - helps in rebuilding of the uterus linig.
-controls develpoment of secondary sexual characterestics.
2)LH- Triggers ovulation.

3)FSH- Maturing of the follicle.
- Stimulates ovaries(or follicle .Not sure) to release oestrogen.
- Afterovulation, level falls to prevent further ovulation.

4)Progesterone - Prevents uterus lining from breaking down.

LH:
-Stimulates release of mature ova
-Stimulates development of corpeus luteum

FSH:
-Stimates development of graphian follicle

Oestrogen:
-Repairs uterus lining

Progesterone:
-Maintains uterus lining during pregnancy
-Prepares uterus lining to accept a zygote
-Prevents release of FSH

Thank you all very much!

 

[whitetiger64]

Is there any other effect of fertilizers on the environment apart from eutrophication?

 

[Ahmedm96]

can you tell me how capilliry tube works

and hoow to study for ecology and circulation icant memorize any thing

and what is selective breeding

 

[dana xP]

can you tell me how capilliry tube works

and hoow to study for ecology and circulation icant memorize any thing

and what is selective breeding

do u mean by capillary tube the capillary tube in the dialysis machine ??

 

[Maz]

Can someone tell me other naming systems other than the binomial system.Please

 

[Saadiya Ahmed]

That's too late xD i took 7 o levels this years ,focused most of it on physics chem and math,i'm learning from past papers for bio since there's no time any advice would be appreciated

theres a book called 'IGCSE Biology Guide'...its the ryte book fer last minute reading...

 

[dana xP]

Can someone tell me other naming systems other than the binomial system.Please

i dont think that mentioning the names of systems other than the binomial system is related to our syllabus
infact it is written in our curriculum content that to KNOW that there ARE OTHER CLASSIFICATION SYSTEMS but NOT to name them ,,, and an example was also provided i.e cladistics are classified on the bases of RNA/DNA sequencing data
so u better not confuse ur self and just KNOW that there is more than one classification systems and u have to learn only one (binomail system)

 

[Maz]

i dont think that mentioning the names of systems other than the binomial system is related to our syllabus
infact it is written in our curriculum content that to KNOW that there ARE OTHER CLASSIFICATION SYSTEMS but NOT to name them ,,, and an example was also provided i.e cladistics are classified on the bases of RNA/DNA sequencing data
so u better not confuse ur self and just KNOW that there is more than one classification systems and u have to learn only on (binomail system)

I thought so but wasnt sure

 

[dana xP]

I thought so but wasnt sure

ok !!

 

[Yousif Mukkhtar]

Is there any other effect of fertilizers on the environment apart from eutrophication?

Eutrophication is the only negative effect. Positive effects are many. Like faster growth because of protein production etc.

 

[Ahmedm96]

do u mean by capillary tube the capillary tube in the dialysis machine ??

nope one like in q3 http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Biology (0610)/0610_w11_qp_31.pdf

 

[omar1999]

Post your doubts here

and if im not busy, i will try to help

can u tell me what does pH have to do with photosynthesis or anything else, what is pH in general, thx

 

[dana xP]

Guys can anybody explain osmoregulation and with examples plz it would be a lot of help to me !!

 

[Maz]

The sylabus says "Describe the process of chewing".

How???