Biology; Chemistry; Physics: Post your doubts here!

[Amber]

So its LOUDNESS, that is to say amplitude :O Thanks anyway...

ur welcome =D

 

[Spidey21]

Q) explain difference between an allele and a gene ?

a gene is the unit for inheritance and allele is the different forms of genes for example...Hair is a gene
and Brown hair, black hair blonde hair, etc are alleles..

EDIT : Hair Colour is the gene not Hair....LOL

 

[Dukeofwin]

Are pepsin and erepsin included when we say Protease?

 

[malay]

Are pepsin and erepsin included when we say Protease?

yeah

 

[Amber]

Ok v.v important:
i need three to four points of why mother's blood is not continuous with the fetal blood? 2 points i know are:

1. the difference in pressure
2. difference in blood group(all that co-aglutination and stuff

so tow or at least one more point!

some substances in the mothers blood can kill the fetus or are harmful to the fetus (CO, nicotine)

 

[Dukeofwin]

yeah

Thanks again!

 

[Dukeofwin]

Ok v.v important:
i need three to four points of why mother's blood is not continuous with the fetal blood? 2 points i know are:

1. the difference in pressure
2. difference in blood group(all that co-aglutination and stuff

so tow or at least one more point!

This question can hardly be of 4 marks, thus two reasons with explanation are enough! The 2 reasons you know are the only included in book. So you are good to go

 

[Talhakhan]

Need help with question 3 part C
..... Plz give some brief detail too... '
http://www.xtremepapers.com/papers/...onal O Level/Biology (5090)/5090_w08_qp_2.pdf

 

[malay]

Thanks again!

no prob

 

[Spidey21]

Need help with question 3 part ..... Plz give some brief detail too... '
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Biology (5090)/5090_w08_qp_2.pdf

(a)J: epidermal cells
K: Spongy Mesophyll cells

 

[Talhakhan]

(a)J: epidermal cells
K: Spongy Mesophyll cells

Sorry its actually part c....

 

[Spidey21]

Sorry its actually part c....

hmm
yeah thought so..

 

[daredevil]

Ok v.v important:
i need three to four points of why mother's blood is not continuous with the fetal blood? 2 points i know are:

1. the difference in pressure
2. difference in blood group(all that co-aglutination and stuff

so tow or at least one more point!

- the mother's blood may be carrying some disease which can be transferred to the fetus whose immune system is not yet fully built up.

 

[Spidey21]

Sorry its actually part c....

at 0300 : it would N
at 19 30 : it ll b O..

 

[malay]

(a)J: epidermal cells
K: Spongy Mesophyll cells

J is cuticle

..see carefully!

 

[Talhakhan]

at 0300 : it would N
at 19 30 : it ll b O..

Why it would be N PLZZZZ need help with this why.... Shouldn't it be M ...

 

[daredevil]

Sorry its actually part c....

c) i) 03 00 : N (because it will be night time [3 a.m.] and the stomal pore will be close.
ii) 19 30 : O (because that will be like early in the morning[7 a.m.] so the sun is not at its full height so stomata will not be fully open but it will be open a little bit.

get it?

 

[Talhakhan]

c) i) 03 00 : N (because it will be night time [3 a.m.] and the stomal pore will be close.
ii) 19 30 : O (because that will be like early in the morning[7 a.m.] so the sun is not at its full height so stomata will not be fully open but it will be open a little bit.

get it?

Thanks alot for the help....

 

[daredevil]

a gene is the unit for inheritance and allele is the different forms of genes for example...Hair is a gene
and Brown hair, black hair blonde hair, etc are alleles..

not hair but 'hair colour' is a gene.

 

[Spidey21]

Why it would be N PLZZZZ need help with this why.... Shouldn't it be M ...

nope it CANT be M
look at 03:00
there is no light and no need for gasoues or any exchange so it will be almost close

and at 19 30 there will be little or no photosynthesis so almost the same but a little bigger

 

[Talhakhan]

.ii) 19 30 : O (because that will be like early in the morning[7 a.m.] so the sun is not at its full height so stomata will not be fully open but it will be open a little bit.
?

If you don't mind its 19 30 (7 p.m) right ..... Thanks for the help anyway....