Biology; Chemistry; Physics: Post your doubts here!

[funky brat]

its kinda maths Q it says half were sown in one condition and half in other.
so 320 + 110 must be approximately equal to 405 + ?
and thus if we add any other no. to 405 its gonna be much much larger than 405

but seriously i cant think of any other solution to it -.-

I even solved it this way but the question remains, where on earth did the missing seeds go?

 

[Dark Destination]

I even solved it this way but the question remains, where on earth did the missing seeds go?

The table is telling about leaves, and the leaves of all plants are not the same.
Some have more leaves and some have less number of leaves.

But in the question they are asking about number of green plants. Maybe thats why. .-.

 

[Awesome12]

Could someone explain continuous and discontinuous variation in detail
***amd***

 

[***amd***]

I even solved it this way but the question remains, where on earth did the missing seeds go?

did not germinate coz of unsuitable condition or perhaps they were stolen

 

[***amd***]

Could someone explain continuous and discontinuous variation in detail
***amd***

View attachment 37865

discont. : only 2 genes involved, cont. : more than 2 genes involved

 

[funky brat]

Could someone explain continuous and discontinuous variation in detail
***amd***

View attachment 37865

Discontinuous variation is any trait that depends on a single or few pairs of genes, also called monohybrid inheritance. This is not affected by environmental factors, for example if a person's blood group is A, it won't be changed because he's living in an extremely cold or hot climate. Also in discontinuous variation there are no intermediates infact there are fixed phenotypes for example sex, a person is either male or a female.
Continuous variation is opposite to this. It is affected by multiple pair of genes. An example is height, there is no fixed height as in a person cannot only be short or tall infact there are many intermediates to this. he can be very tall or very short etc. And it is also influenced by environmental factors for example a person might not be able to gain weight because of malnutrition.

 

[funky brat]

discont. : only 2 genes involved, cont. : more than 2 genes involved

Discontinuous variation can depend on a single gene too.

 

[***amd***]

Discontinuous variation can depend on a single gene too.

:-o ok.
Awesome12 this laady is beter in bio

 

[funky brat]

:-o ok.
Awesome12 this laady is beter in bio

Edit: Horrible at Maths.

 

[***amd***]

Edit: Horrible at Maths.

chalta hai. like I am hardly up to A in Islamiat .-.

 

[funky brat]

chalta hai. like I am hardly up to A in Islamiat .-.

You'll get an A I'm sure.

 

[***amd***]

You'll get an A I'm sure.

we're getting of topic

 

[Awesome12]

Discontinuous variation is any trait that depends on a single or few pairs of genes, also called monohybrid inheritance. This is not affected by environmental factors, for example if a person's blood group is A, it won't be changed because he's living in an extremely cold or hot climate. Also in discontinuous variation there are no intermediates infact there are fixed phenotypes for example sex, a person is either male or a female.
Continuous variation is opposite to this. It is affected by multiple pair of genes. An example is height, there is no fixed height as in a person cannot only be short or tall infact there are many intermediates to this. he can be very tall or very short etc. And it is also influenced by environmental factors for example a person might not be able to gain weight because of malnutrition.

discont. : only 2 genes involved, cont. : more than 2 genes involved

Thanks for the explanation

 

[Dream.Eater]

Guys can anybody explain this MCQ? I really don't get it. MCQ number 3.
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_w03_qp_1.pdf

Ans is A
Since hydrogen has a lower Mr than air, at first it diffuses into the closed air chamber which increases the pressure inside it making the water level fall. But as time passes hydrogen will diffuse out of the porous pot down a concentration gradient. Therefore the level of wall will return to its original level at X.
Hope this helps!

 

[Dream.Eater]

Ans is A
Since hydrogen has a lower Mr than air, at first it diffuses into the closed air chamber which increases the pressure inside it making the water level fall. But as time passes hydrogen will diffuse out of the porous pot down a concentration gradient. Therefore the level of wall will return to its original level at X.
Hope this helps!

Oh this question has already been answered. Didnt see the next page. My bad....

 

[asadalam]

So how much have you people prepared?

Barely a month left in exams. .-.

Well i did all the papers beforehand so now i guess i'll do them again for revision,but i'm bored so i play fifa all the time
Mocks result is in and it was fine so i just have to revise and do the papers again now,in April.

 

[Awesome12]

Ans is A
Since hydrogen has a lower Mr than air, at first it diffuses into the closed air chamber which increases the pressure inside it making the water level fall. But as time passes hydrogen will diffuse out of the porous pot down a concentration gradient. Therefore the level of wall will return to its original level at X.
Hope this helps!

What if we had CO2 instead of the H2, would the CO2 also diffuse back?

 

[Dark Destination]

Well i did all the papers beforehand so now i guess i'll do them again for revision,but i'm bored so i play fifa all the time
Mocks result is in and it was fine so i just have to revise and do the papers again now,in April.

Woah. How many years did you do? And all variants?

 

[Dark Destination]

What if we had CO2 instead of the H2, would the CO2 also diffuse back?

If there was CO2 instead of H2, the water level would RISE, and then return back to X after a while.
And yes, CO2 would diffuse back too.

 

[Awesome12]

If there was CO2 instead of H2, the water level would RISE, and then return back to X after a while.
And yes, CO2 would diffuse back too.

Thanks. That makes much more sense. So any gas will always diffuse back regardless of it density