BIOLOGY PAPER 31 AND 1 DOUBTS!

[mushiii]

ASK HERE! YO!

 

[pyaparus]

Whats the function of viterous and aqueous humor in d eye?

 

[My Name]

http://www.automaticpapers.com/igcs...rs/biology/paper-1/bio_s11_1.php#.U3OeefmSy4n
question
21
31
36
39
give me reasons
y answre are
C
A
A
B

 

[Ahmed Abdullah]

http://www.automaticpapers.com/igcs...rs/biology/paper-1/bio_s11_1.php#.U3OeefmSy4n
question
21
31
36
39
give me reasons
y answre are
C
A
A
B

21) As ribs starts to raise, volume of thorax increase, thus pressure will decrease.
31)As u see in the picture 2 rabbits are dark and 2 are white which means the ratio is 1:1. If we cross Rr and rr we will get this ratio
36)dont know how to explain this, just google condensation and u will get it
39)overgrazing causes soil erosion, where the soil layer becomes thin, thus it will have less nutrients.

 

[Ahmed Abdullah]

Whats the function of viterous and aqueous humor in d eye?

vitreous* humor is everything in between the lens and retina it has few cells and transparent so light can pass through.
aqueous humor provides nutrition for the tissues

 

[Akshajistari]

Does anyone notice that the October/November 2013 questions for biology seem more difficult than older ones?

 

[mushiii]

Whats the function of viterous and aqueous humor in d eye?

vitreous humor jelly like fluid keeps the shape of the eye supports retina to be attacted to the coroid and also helps in refraction
while aqeous provides the cornea with water and glucose(food) also helps in rarefaction

 

[mushiii]

Does anyone notice that the October/November 2013 questions for biology seem more difficult than older ones?

i thought it was pretty easy just try and solve it again

 

[The Mighty Nobody]

anyone?
Bio doubt:
Just wanted to know that why is glucose absorbed by the ileum through active transport and not diffusion? How is the glucose lower in concentration, I mean it isn't previously absorbed by any other cell before the food reaches the ileum then how does the high concentration of glucose that is ingested become less, (where does it vanish! ) that it needs to be absorbed by active transport?
Help!

 

[mushiii]

anyone?
Bio doubt:
Just wanted to know that why is glucose absorbed by the ileum through active transport and not diffusion? How is the glucose lower in concentration, I mean it isn't previously absorbed by any other cell before the food reaches the ileum then how does the high concentration of glucose that is ingested become less, (where does it vanish! ) that it needs to be absorbed by active transport?
Help!

glucose obviously gets assimilated (used up by the body organs and absorbed into the blood stream) so little conc will remain so when it reaches the ileum, it will be absorb from high to low conc

 

[LULUL15]

Hav u all finished ur exam. ?