Biology; Chemistry; Physics: Post your doubts here!

[luckywang]

Please someone, What is ATP?

alternative to practical?

 

[luckywang]

compensation point is the point (usually dawn and dusk) when there is no net movement of CO2.This happens cuz the rate of respiration and photosynthesis r at equilibrium i.e amount of CO2 absorbed for photosynthesis is equal to the amount of CO2 released by respiration.....n also stop crying!

i cant! tomorrow is the exam and so many thing i dont know! OMG! GOD BLESS ME PLS!

 

[sedanx]

Please someone, What is ATP?

Adenosine triphosphate - it is a coenzyme which transports chemical energy in the cells fro metabolic reactions. (note: one function of phosphate ions is to make ATP)

 

[Gaara_of_the_sand]

auxins?????????????what are they

and are they in our course.................pls help

 

[luckywang]

http://www.xtremepapers.com/papers/...nal O Level/Biology (5090)/5090_s11_qp_12.pdf
what is the use of KOH in question 16?

 

[kitecrystal]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Biology (5090)/5090_s11_qp_12.pdf
what is the use of KOH in question 16?

to absorb carbon dioxide.

 

[Fallen316]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Biology (5090)/5090_s11_qp_12.pdf
what is the use of KOH in question 16?

to absorb co2.

 

[Maz]

alternative to practical?

No. Adenosine triphosphate

 

[sedanx]

auxins?????????????what are they

and are they in our course.................pls help

they are plant hormones which promote cell elongation in the shoot of the plant and inhibit cell elongation in the root.
So, the part that has more auxin in the shoot elongates more whereas part that has more auxin in the root elongates less ... thus the bending (up and down respectively)

 

[malay]

No. Adenosine triphosphate

lol..for a moment even i thought it waz Alternate to Practical

 

[Gaara_of_the_sand]

they are plant hormones which promote cell elongation in the shoot of the plant and inhibit cell elongation in the root.
So, the part that has more auxin in the shoot elongates more whereas part that has more auxin in the root elongates less ... thus the bending (up and down respectively)

thanks a million

 

[Fallen316]

auxins?????????????what are they

and are they in our course.................pls help

they are plant hormones which promote cell elongation in the shoot of the plant and inhibit cell elongation in the root.
So, the part that has more auxin in the shoot elongates more whereas part that has more auxin in the root elongates less ... thus the bending (up and down respectively)

they are not in our syllabus .

 

[stayawayfromhere]

what do we have to know about negative feedback and hormones in food production ? and what do we have to know about behavior ? only taxis right ? or also the definition of it ?

 

[Maz]

lol..for a moment even i thought it waz Alternate to Practical

Haha .
Anyways, any help?

 

[malay]

Haha .
Anyways, any help?

yup about Tropisms n auxins...i still didnt get dat part?

 

[stayawayfromhere]

what do we have to know about negative feedback and hormones in food production ? and what do we have to know about behavior ? only taxis right ? or also the definition of it ?

 

[luckywang]

to absorb carbon dioxide.

same as NaOH? also absorb CO2?

 

[Maz]

Sorry, just realised i entered the wrong thread, I am giving IGCSE's not O levels.

 

[kitecrystal]

same as NaOH? also absorb CO2?

yes.

 

[Fallen316]

same as NaOH? also absorb CO2?

yup.

 

[luckywang]

http://www.xtremepapers.com/papers/...nal O Level/Biology (5090)/5090_s11_qp_12.pdf
how about question 27.... is carbon cycle required so detail?!?!?! i tot syllabus only wan the outline?