Biology Mcq Preperation..

[robinhoodmustafa]

post your doubts here.

Mcq carries 40 marks.

 

[robinhoodmustafa]

Help me.

 

[robinhoodmustafa]

and this

 

[thementor]

Help me.

Ans C becoz at that part there is no % change in length

 

[thementor]

and this

Q16. A becoz that is the arterial end...pressure at arterial end > pressure at venuous end
Q15.C becoz it is the only blood vessel which is connecting two organs.....therefore transferring blood from one capillary system to another.

 

[robinhoodmustafa]

Ans C becoz at that part there is no % change in length

Thanks

Tell me that which part of the brain is responsible for changes in temperature? Is it Cerebrum or Hypothalamus

 

[robinhoodmustafa]

Q16. A becoz that is the arterial end...pressure at arterial end > pressure at venuous end
Q15.C becoz it is the only blood vessel which is connecting two organs.....therefore transferring blood from one capillary system to another.

What will be the answer ? and why hair Erector muscle contracts and relax?

 

[ReN0uNeD De\/!|_]

What will be the answer ? and why hair Erector muscle contracts and relax?

C: bc arterioles will consrtict( vasoconstriction) and erector contract to minimize heat loss...
when the erector muscles contract, the body gains heat (the erector muscles causes the hairs to stand up and creates a layer of air which acts as an insulation and thus minimize heat loss)

 

[ReN0uNeD De\/!|_]

Thanks

Tell me that which part of the brain is responsible for changes in temperature? Is it Cerebrum or Hypothalamus

Hypothalamus

 

[robinhoodmustafa]

 

[ReN0uNeD De\/!|_]

B: P is homozygous dominant and thus produce al heterzoygous offspring while Q is heterozygous that's y it produces 50:50... u can ur self confrm it by a genetic diagram if u wish.... remember one thing.... when heterozygous crosses with homozygous recessive the offspring are in 50:50 ratio....

 

[FAizan007]

Help me.

C 0.3

 

[Mustafa Malik]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_s09_qp_1.pdf
Plz Plz explain 28 n 30..