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Physics, Chemistry and Biology: Post your doubts here!

sj0007

sj0007

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ZaqZainab said:
bt in my school we don't have it
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neither in my skool.....here in my dammam region only one skool offers it.....but my dad helped me with this............if u go 2 pakistan.....ever other skool and academy offers it.......
 
sj0007

sj0007

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siddharth dagar said:
s
i have done all past papers of majorly all subjects. specially bio but i am worried about the practicals. plus some past papers were really tough and some were very easy. furthur more do you know how grade boundries work work
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just check the grade threshholds for prevous years they pretty much follow the same pattern :)
 
ZaqZainab

ZaqZainab

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Anybody giving Bio I have got a lot of problem with scale which making the graphs
what scale should i take for
Temperature-20,25,30,35,40 on the x axis with 17 cm
and for distance moved-41,63,96,168,120 on the y axis with 15 cm
I tried take x axis as 0,5,10,15,20,25,30,35,40,45,50...... but this does not take over half the graph now i can't take it as 0,1,2,3,4,5,which won't fit in the graph
and y axis as 0,20,40,60,80,100,120,140,160,180,200,... but this doesn't take over half the graph too if i take 0,10,20,30,40,50 it doesn't fit am i allowed to take 0,15,30,45,60.....
 
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Mohammed salik

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weirdoatlarge77 said:
How does having dry scaly skin for reptiles reduce water loss?
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Water is less of a problem to lizards than is temperature regulation. All reptiles excrete uric acid and thus do not need great amounts of liquid to rid themselves of nitrogenous wastes. All insectivorous lizards take in a large amount of water in the prey that they consume, and herbivorous lizards have salt glands for the active excretion of mineral salts. Because of their low metabolic rates relative to those ofbirds and mammals, lizards use less water
 
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