Biology; Chemistry; Physics: Post your doubts here!

[Afaq123]

what are you talking about my papers was 99% correct

the question stated that trundle had circumference of 50 cm but in diagram trundle had 100cm circumference

 

[Kiara P.]

Plz anyone tell me what is the relation between cuticle and stomata...???
I mean why is there a thicker waxy layer where the stomata are present???

A plant's cuticle is the waxy layer protecting the epidermis of the leaf from excess evaporation of water as for stomata it's the one in which transpiration happens
The relation between both is that both can prevent excess transpiration ( Example: Stomata Closes It's pores on a really hot day)

 

[A*****]

A plant's cuticle is the waxy layer protecting the epidermis of the leaf from excess evaporation of water as for stomata it's the one in which transpiration happens
The relation between both is that both can prevent excess transpiration ( Example: Stomata Closes It's pores on a really hot day)

But consider this thing that a normal plant has stomatal pores on the lower surface and its cuticle is densed on the same surface...
And a water lilly has stomatal pores on the upper surface and its cuticle is thicker on the upper surface
Why is it so?

 

[Kiara P.]

But consider this thing that a normal plant has stomatal pores on the lower surface and its cuticle is densed on the same surface...
And a water lilly has stomatal pores on the upper surface and its cuticle is thicker on the upper surface
Why is it so?

Perhaps it's because of environmental conditions and mutation.
Different flowers have different positions, Looking at a desert plant you'll notice that it's stomata is in the lower surface in order not lose water so much and dehydrate as it's a really hot climate weather.

 

[Alpha Destro]

the question stated that trundle had circumference of 50 cm but in diagram trundle had 100cm circumference

You sure buddy? that doesnt matter any way when the question already stated that its circumference 50cm
btw what did answer did you write in the oscilloscope question the one one in which they asked what would happen to the trace when resistance of rheostat will be increased.

 

[A*****]

Perhaps it's because of environmental conditions and mutation.
Different flowers have different positions, Looking at a desert plant you'll notice that it's stomata is in the lower surface in order not lose water so much and dehydrate as it's a really hot climate weather.

Ok thanx...!!!!
And best of luck for your biology paper tomorrow

 

[Afaq123]

You sure buddy? that doesnt matter any way when the question already stated that its circumference 50cm
btw what did answer did you write in the oscilloscope question the one one in which they asked what would happen to the trace when resistance of rheostat will be increased.

question was when resistance would be decreased. The dot move upwards

 

[Afaq123]

You sure buddy? that doesnt matter any way when the question already stated that its circumference 50cm
btw what did answer did you write in the oscilloscope question the one one in which they asked what would happen to the trace when resistance of rheostat will be increased.

It matters because the diagram had 10 marks of 10cm which means wheel had circumference of 100 cm

 

[chum1234]

The paper had a question printed wrong. That trundle one

paper 62 ??

 

[Afaq123]

paper 62 ??

yes

 

[chum1234]

Plz anyone tell me what is the relation between cuticle and stomata...???
I mean why is there a thicker waxy layer where the stomata are present???

Thicker waxy layer on the cuticle prevents loss of water ( transpiration ) and the stomata is present in the bottom so reduce water loss on perhaps a sunny day coz if they were on top they would be directly exposed , they open and close accordingly to their requirements

 

[Alpha Destro]

Plz anyone tell me what is the relation between cuticle and stomata...???
I mean why is there a thicker waxy layer where the stomata are present???

i know why , beause on the upper surface of the leaf the pallisade mesophyl is present which is dense hence less vapour escapes from the upper surface thus lesser waxy layer but on the under side there is spongy mesophyl whichis loosey packed and has many air pockets, more water loss thus more waxy layer.i dont think its related it to the presence of stomata . What is your resource i dont think its correct

 

[chum1234]

yes

Are my paper was pretty accurate no mistakes B)

 

[chum1234]

Thicker waxy layer on the cuticle prevents loss of water ( transpiration ) and the stomata is present in the bottom so reduce water loss on perhaps a sunny day coz if they were on top they would be directly exposed , they open and close accordingly to their requirements

Btw stomata does not have a waxy layer ...

 

[chum1234]

NO it was when resistance would be incresed and how come the trace will move down if resistance is decreased GENIUS

Guys whats you exam for tomorrow ? maths and bio ??

 

[Alpha Destro]

Ok i just mixed it up ur right resistance was decreased which increased the voltage across the fixed resistor Sorry

 

[Afaq123]

Ok i just mixed it up ur right resistance was decreased which increased the voltage across the fixed resistor Sorry

What about tomorrows atp

 

[Alpha Destro]

What about tomorrows atp

What abt it ?

 

[A*****]

i know why , beause on the upper surface of the leaf the pallisade mesophyl is present which is dense hence less vapour escapes from the upper surface thus lesser waxy layer but on the under side there is spongy mesophyl whichis loosey packed and has many air pockets, more water loss thus more waxy layer.i dont think its related it to the presence of stomata . What is your resource i dont think its correct

I am studying from 'Biology Matters' and that is an authentic one...
The question just arose in my mind...and it is not linked to the book

 

[A*****]

Thicker waxy layer on the cuticle prevents loss of water ( transpiration ) and the stomata is present in the bottom so reduce water loss on perhaps a sunny day coz if they were on top they would be directly exposed , they open and close accordingly to their requirements

But the stomatal pores in alilly are located on the upper epidetmis :-\