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Physics, Chemistry and Biology: Post your doubts here!

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View attachment 41065Label
: from
rachis / calamus / after feathers / vane / shaft / quill /
umbilicus / barb;


where to label these?
darling you dont need to know such intricate details, the ms just gives various options so that if any candiadate is highly read will not loose on the marks.

simply labelling feathers/midrib/ruffled feathers will get you your full marks.
 
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some times in biology paper 6 they tell u to make a graph but they wont tell u wht type of graph, they will say 'using the figures from table xyz plot a graph'.
how do we know if its line graph, bar graph or histogram?
 
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some times in biology paper 6 they tell u to make a graph but they wont tell u wht type of graph, they will say 'using the figures from table xyz plot a graph'.
how do we know if its line graph, bar graph or histogram?
I'm not sure but whenever he needs bar chart and histogram he asks u to draw them otherwise he wants a line graph.
 
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can someone please outline the steps of blood clotting, including the formation of scab, thanks..
 
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in magnification if they gave me the area of a drawing (eg 144) and said to convert actual area and magnification is ( eg x300) shouldi divide drawing by 300 squared. as it is area not length?
 
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can someone please outline the steps of blood clotting, including the formation of scab, thanks..
1. the damaged tissues secrete thrombokinase protein
2. thrombokinase convert prothrombin protein present in blood int o thrombin
3. thrombin than converts soluble fibrinogen into insoluble fibrin
4. fibrin forms a mesh work over the wound and so prevent escaping of reb blood cells (thx is wt scalp is)
5. pphagocytes and lymphocytes reach the site and start phagocytosis
hope it helped
 
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1. the damaged tissues secrete thrombokinase protein
2. thrombokinase convert prothrombin protein present in blood int o thrombin
3. thrombin than converts soluble fibrinogen into insoluble fibrin
4. fibrin forms a mesh work over the wound and so prevent escaping of reb blood cells (thx is wt scalp is)
5. pphagocytes and lymphocytes reach the site and start phagocytosis
hope it helped
yes it did! :LOL: thank you very much(y):)
 
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can someone please outline the steps of blood clotting, including the formation of scab, thanks..
1. Platelets accumulate at sight of cut
2. Release thrombin
3. Thrombin converts fibrinogen (soluble) from the plasma to fibrin
4. Fibrin is insoluble
5. Plugs blood flow
6. Prevents bacteria entering
7. With time, wound heals.
 
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1. Platelets accumulate at sight of cut
2. Release thrombin
3. Thrombin converts fibrinogen (soluble) from the plasma to fibrin
4. Fibrin is insoluble
5. Plugs blood flow
6. Prevents bacteria entering
7. With time, wound heals.
Oh..........i dint notice someone had already answered :oops:
 
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solve 2c of 0610_w02_qp_6.pdf

Ascorbic acid is vitamin C so the test for vitamin C has to be used.
In my book the test for vitamin c is:
With the use of a syringe add juice drop by drop to a 2cm^3 of a 0.1 per cent solution of DCPIP (a blue dye) in a test-tube. The DCPIP will become colourless quite suddenly as the juice is added. The amount of juice added from the syringe should be noted down. Repeat the experiment with a different fruit juice. The more drops added to the fruit juice in order to decolourise DCPIP the less ascrobic acid (vitamin C) present in the juice.

i dnt think they ask this test anymore thou i hope it helped!
 
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