A level Biology: Post your doubts here!

[My Name]

9709_w07_qp4 (M1)
what would be the solution to part(ii) of this question?
pls helpView attachment 52484

Hey umm...this is the Bio thread
Post your doubt here:
https://www.xtremepapers.com/community/threads/mathematics-post-your-doubts-here.9599/

 

[fantastic girl]

This is going to be a LONG discussion!
Better in convo!
One big reason for less people giving AS.......NO ONE ( no teachers) is supportive!

ikr !
da helll!!
only sir shanu is pushing the students to give AS.

 

[qwertypoiu]

I'm giving AS by itself

 

[ashcull14]

 

[qwertypoiu]

View attachment 52490

All energy made in the ecosystem comes from photosynthesis. The energy that the plant lost, kept, used, etc. ALL originally came from its photosynthesis. Therefore:
Energy from photosynthesis: 27,000 + 3000 = 30,000
Energy from Sun = 1,000,000
Percentage = 30,000/1,000,000*100%=3%

 

[ashcull14]

All energy made in the ecosystem comes from photosynthesis. The energy that the plant lost, kept, used, etc. ALL originally came from its photosynthesis. Therefore:
Energy from photosynthesis: 27,000 + 3000 = 30,000
Energy from Sun = 1,000,000
Percentage = 30,000/1,000,000*100%=3%

nice ty

 

[ashcull14]

 

[qwertypoiu]

View attachment 52493

I'm not sure, but for the airways to be constricted, smooth muscles have to contract. So they're more active. Also, activity of cilia should be less I think, because they become paralysed when one smokes I think due to mucus. I'm not sure why goblet cells would wanna do endocytosis, my guess is that they need to take in more materials now than before in order to be able to produce mucus. So I'd go for C but again I'm not sure.

 

[salma_69]

View attachment 52493

i go for B as during asthma attacks more mucus is produced cuz some foriegn substance actually entered which triggered the asthma attack so choice 2 is now eliminated as exocytosis will increase not endocytosis and as 2 is eliminated the ans should be B the cilia will be more active as it will try to remove the excess mucus produced
what is the answer by the way

 

[Midnight dream]

View attachment 52493

is the answer C?

 

[qwertypoiu]

i go for B as during asthma attacks more mucus is produced cuz some foriegn substance actually entered which triggered the asthma attack so choice 2 is now eliminated as exocytosis will increase not endocytosis and as 2 is eliminated the ans should be B the cilia will be more active as it will try to remove the excess mucus produced
what is the answer by the way

Your reasoning is good I change my mind lol

 

[Lola_sweet]

i go for B as during asthma attacks more mucus is produced cuz some foriegn substance actually entered which triggered the asthma attack so choice 2 is now eliminated as exocytosis will increase not endocytosis and as 2 is eliminated the ans should be B the cilia will be more active as it will try to remove the excess mucus produced
what is the answer by the way

is the answer C?

I'm not sure, but for the airways to be constricted, smooth muscles have to contract. So they're more active. Also, activity of cilia should be less I think, because they become paralysed when one smokes I think due to mucus. I'm not sure why goblet cells would wanna do endocytosis, my guess is that they need to take in more materials now than before in order to be able to produce mucus. So I'd go for C but again I'm not sure.

View attachment 52493

Answer is B (checked the markscheme) and salma_69 is right exocytosis will increase nt endo

 

[Midnight dream]

Answer is B (checked the markscheme) and salma_69 is right exocytosis will increase nt endo

i am doomed....

 

[Midnight dream]

Lola_sweet Hows ur prep?

 

[Lola_sweet]

i am doomed....

heyyy its okay we all make mistakes
like i thought SiO2 conducted electricity My Name xD
we r just stressed and nervous thou we shouldnt be
Ik u can do it sis and u aient doom yet

 

[Lola_sweet]

Lola_sweet Hows ur prep?

going somewhere good i hope

 

[My Name]

i am doomed....

NO YOU AREN'T!

Lola_sweet Hows ur prep?

When she wants to she can Mary Jones !

 

[Lola_sweet]

NO YOU AREN'T!

When she wants to she can Mary Jones !

im nt mary jones

 

[Midnight dream]

heyyy its okay we all make mistakes
like i thought SiO2 conducted electricity My Name xD
we r just stressed and nervous thou we shouldnt be
Ik u can do it sis and u aient doom yet

Thanks for the encouragement..
Just pray i dont screw up....I HATE biology

 

[My Name]

heyyy its okay we all make mistakes
like i thought SiO2 conducted electricity My Name xD
we r just stressed and nervous thou we shouldnt be
Ik u can do it sis and u aient doom yet

YEP