A level Biology: Post your doubts here!

[Hisham Khan]

I did my iftari and it looks like I'm going to vomit

 

[A*****]

I did my iftari and it looks like I'm going to vomit

Should have eaten less

 

[Hisham Khan]

Hear this song.IT'S BEAUTIFUL

 

[Hisham Khan]

Can Anyone help me with this question.I don't get it

 

[Hisham Khan]

Too many pics oops

 

[Hisham Khan]

I saw a pastpaper in which they asked a social reason because of which it is difficult to control malaria and it was travel but in prev past paper they said tourism and travel is wrong btw it should be because malaria isin't a contagious diseases like TB etc so WHY?????

 

[Hisham Khan]

Pls answer this uestion as well.WHATS THE ANSWER OT THIS

Q31

 

[A*****]

Can Anyone help me with this question.I don't get it
View attachment 63831View attachment 63831 View attachment 63831 View attachment 63831 View attachment 63831

D according to this

 

[A*****]

Pls answer this uestion as well.WHATS THE ANSWER OT THIS
View attachment 63832
Q31

It's 5 right??

 

[Hisham Khan]

It's 5 right??

5 TF

 

[Hisham Khan]

 

[Hisham Khan]

why it isin't 10 or 9 ...

 

[Hisham Khan]

It's 5 right??

Wait didn't you say 9?

 

[A*****]

Wait didn't you say 9?

Lol I said 5 plz read carefully...................
Not 9 or 10 bqz that particular question says phopholipid LAYERS so 5 times 2 is 10
This question asks about phopholipid BILAYERS which is 5 NOT 10....

 

[Hisham Khan]

Lol I said 5 plz read carefully...................
Not 9 or 10 bqz that particular question says phopholipid LAYERS so 5 times 2 is 10
This question asks about phopholipid BILAYERS which is 5 NOT 10....

Oh I get it
No u

 

[A*****]

Oh I get it
No u

Glad that u got it

 

[SohaibButt]

Help

 

[Hisham Khan]

Concentration is always consectively halfed of the previous conc of volume in serial dilutions so A.Serial dilution came in paper 34 As well I guess
20: Answer D

 

[SohaibButt]

Concentration is always consectively halfed of the previous conc of volume in serial dilutions so A.Serial dilution came in paper 34 As well I guess
20: Answer D

Ur right but for what D is used for in dilution

 

[Hisham Khan]

Sorry I don't get you.The concentration is halved each time so answer is A.Simple.
8/2=4%. 4/2=2% 2/2=1% 1/2=0.5% and so on