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http://www.xtremepapers.com/papers/...onal O Level/Biology (5090)/5090_w07_qp_6.pdf
Please solve question 2b
Answer needed urgently!!
Please solve question 2b
Answer needed urgently!!
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Holes,smearsorfilterpaperdiscsonculturedishes; [or a group of separate dishes]http://www.xtremepapers.com/papers/...onal O Level/Biology (5090)/5090_w07_qp_6.pdf
Please solve question 2b
Answer needed urgently!!
Holes,smearsorfilterpaperdiscsonculturedishes; [or a group of separate dishes]
dilutions mentioned ; R: volumes
clear areas measured/observed ;
how results assessed ;
replication ;
control qualified ;
constant environment/temp/volume/
As specified in mark scheme
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Biology (5090)/5090_w07_qp_6.pdf
Please solve question 2b
Answer needed urgently!!
1) Use different samples of food and ignite them under a test tube containing water with a thermometer(at least 1/3rd immered). use the method for each food sample, like separately for carbohydrate, fat, and protein. Record the temperature increase in each test tube by burning the food sample. The highest temperature difference indicates highest energy content. This will be of fats.help!!!
can someone please tell me
how to find the energy content of foods?
and how to demonstrate the presence of stomata in a leaf?
also what is lymph and lymphatic system?
Please solve my doubt. May-June 2004 q. 3.a.i.) Need to know the position of the seed. Also all the bio p6 q, need to know the labeling for the diagrams as it aint mentioned in the markscheme. please reply asap. thank u
X is the antherits may-june 2005, q2aii./0610/06.
next doubt is june 2004 q3ai. /0610/06
You might be confused in stigma and anther, actually the 2 in between are the stigmas, and the other 3 are stamens.I know that
I just dont know its location :/
can you label and upload the pic please?
thank you1) Use different samples of food and ignite them under a test tube containing water with a thermometer(at least 1/3rd immered). use the method for each food sample, like separately for carbohydrate, fat, and protein. Record the temperature increase in each test tube by burning the food sample. The highest temperature difference indicates highest energy content. This will be of fats.
2) stomata are minute openings (pores) on the underside of the leaf. Their presence can be demonstrated simply by immersing a leaf in water. Bubbles will come out of the lower surface of the leaf showing that there are pores.
3) Tissue fluid forms at the arterial (coming from the heart) end of capillaries because of the higher pressure of blood compared to veins, and most of it returns to its venous ends and venules; the rest (1%) enters the lymph capillaries as lymph. Thus, lymph when formed is a watery clear liquid with the same composition as the tissue fluid. However, as it flows through the lymph nodes it comes in contact with blood, and tends to accumulate more cells (particularly, lymphocytes) and proteins. Lymphatic system is just that it is in continuous circulation as it takes in tissue fluid and returns it to the blood.
Can someone please send me 2007-2010 igcse biology edexcel exams? I can't seem to find any on the internet!
does yeast respires aerobically or anaerobically? especially in bread, cheese nd yogurt making
It respires anaerobicallydoes yeast respires aerobically or anaerobically? especially in bread, cheese nd yogurt making
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