Biology mcq's help ...

[sweetiepie]

@ marykins did u c my answer i explained u...

 

[marykins]

@ marykins did u c my answer i explained u...

Aaaah yeah ... it was really helpful geez , thanks ... answer my recent one as well please =)

 

[sweetiepie]

i dont know...

 

[mrpaudel]

for qn1dtrcm.pdf ...the answer is cytosine and guanine...!! coz Adenine and guanine are purine bases which means it has two rings...whereas other three are pyramidine which has one ring only...now X has only onr ring and Y has two ring..means u shud choose from above...u will get answer C ..!!

 

[mrpaudel]

and for the other one...answer is A...coz distance between sister chromatids goes on increasing...which is therefore number 2.....and distance between poles of spindle and centromere ..1st it decreases slowly..like there's a little contraction..and after that it pulls towards it..thus decreasing distance much likely...which is so number 1...therefore answer is A

 

[sweetiepie]

What proportion of the stored chemical energy in grass is converted into new tissues by a growing cow?
A between 0.02% and 2%
B between 0.2% and 2%
C between 2% and 20%
D between 20% and 50%

A farmer wants to encourage the beneficial bacterial reactions involved in the nitrogen cycle in wheat fields?
A adding artificial nitrate fertiliser
B draining waterlogged fields
C growing the same crop every year
D irrigating fields

explain me dix?

 

[Romeo10]

What proportion of the stored chemical energy in grass is converted into new tissues by a growing cow?
A between 0.02% and 2%
B between 0.2% and 2%
C between 2% and 20%
D between 20% and 50%

A farmer wants to encourage the beneficial bacterial reactions involved in the nitrogen cycle in wheat fields?
A adding artificial nitrate fertiliser
B draining waterlogged fields
C growing the same crop every year
D irrigating fields

explain me dix?

for 1 it is C as it is bnot quite high and not quite low like the rest of the answers ... I hope u understand me ...
For 2 it is B I think as dranage of waterlogged fields is very good for lots of bacteria.........

 

[sweetiepie]

m not getting it..