ANSWERING ALL BIO/CHEM PAPER 1 DOUBTS :)

[сᴏᴏʟ сяуѕтᴀʟѕ]

maybe double displacement?

no idea
don't even know whether does 'double displacement' exist or not

 

[Skynox]

maybe double displacement?

Exactly like reacting sodium chloride with silver nitrate ...

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Exactly like reacting sodium chloride with silver nitrate ...

yeah..

 

[Besterlinks]

GUYS, which IGCSE Biology MCQ (Paper 1) papers have you'll found challenging? Anything from 1994 to 2011...

 

[kumiko]

I dont understand the MJ01 question 29. Many thanks!!!!

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

GUYS, which IGCSE Biology MCQ (Paper 1) papers have you'll found challenging? Anything from 1994 to 2011...

if you ask me..
none yet

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

I dont understand the MJ01 question 29. Many thanks!!!!

 

[Alool]

why is the answer not B?

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

View attachment 12599
why is the answer not B?

bcoz birds are eating the insects...it says competion! which means that insects food is eaten by someone. iow seeds are eaten by someone else 2...
is the answer D?

 

[ygyh45]

Assalam-o-alaikum wr wb..
View attachment 12559

thank u

 

[TheBaller23]

View attachment 12599
why is the answer not B?

read the question carefully.. it asks "seed eating insects".. the only two animals which eat the seeds are insects and birds so the answer is B

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

thank u

Your welcome

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

read the question carefully.. it asks "seed eating insects".. the only two animals which eat the seeds are insects and birds so the answer is B

D**

 

[TheBaller23]

D**

woops yeah sorry D**

 

[Jspake]

View attachment 12597

Hey, please clear my doubts here.. if all the grand parents were heterozygous, won't the ratio be 3 : 1 ?? According to what I know, the ratio is 1 : 1 when one parent is heterozygous and the other is homozygous recessive!

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Hey, please clear my doubts here.. if all the grand parents were heterozygous, won't the ratio be 3 : 1 ?? According to what I know, the ratio is 1 : 1 when one parent is heterozygous and the other is homozygous recessive!

1 being heterozygous and the other homozygous means that it is 100% that is all have the dominant allele as there phenotype (normal, in this case)

 

[L.V.D]

Thanks for solving my doubts i really get it now (Cool crystals)
sorry for too much questioning

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Thanks for solving my doubts i really get it now (Cool crystals)
sorry for too much questioning

it's okie...you seriously don't need to apologize..i am glad if i was of some help
juss remember me in your prayers

 

[Jspake]

1 being heterozygous and the other homozygous means that it is 100% that is all have the dominant allele as there phenotype (normal, in this case)

I've tried to make a rough sketch of an example of crosses between a heterozygous and a homozygous recessive.. check it out!

 

[Skynox]

I've tried to make a rough sketch of an example of crosses between a heterozygous and a homozygous recessive.. check it out!

Exactly…