~AS Bio doubts Here !!~

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nidzzz09

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Ok ! i have created this tread All dobts can be cleared in here

Post them all here maybe i can help you or perhaps you might help me ! :friends:
 
thunderingthunder

thunderingthunder

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nidzzz09 said:
Ok here i have got a website has awesome bio AS n A2 notes
http://www.biologymad.com/
Click to expand...
i had a luk on these notes...these notes are AWESOME and easy to learn... THANK YOU!! :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo: :Bravo:
 
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hassam

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nidzzz09......explain me water properties of surface tension and how they are beneficial to pond skaters....WHY it is difficult to eradicate TB
 
girlscampisra

girlscampisra

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As the molecules on the surface stick together, they form an invisible "skin" called surface tension.. For instance, pond skaters (sometimes also called water striders), along with other similar insects, can walk on the water without sinking because the surface tension of the water is strong enough to hold them! The feet of the insects actually make tiny dents in the surface tension,but not enough to break the tension allowing them to stride or skate across the water..
 
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nidzzz09

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Alrite
Water has high collision ie the tend to stick to each other cuz of the hydrogen bond btw the water molecule.. This high colision results in high surface tension (alll water molecule sticking to each other forming a strong layer) an... ya girlscampisra said it rght .. the insect feet are so tiny that the force at which they walk on or rather skate are so the force applied is so miniature that it does not break the High surface tension

Tuberculosis are caused by bacteria . There are strains of these bacteria which are increasingly resistant to drugs - antibodies (for example many type of bacteria have enzymes which destroy antibodies).
Also there is a population grwth of bacteria which are now resistant to multiple drugs including the most effective ones so some no remain alive somewhere might be in human itself or faeces or food, water etc.. so they get transfered to other organism multiplying and making resurgence possible
 
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nidzzz09

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arsimme said:
Wow these notes are seriously amazing..thanx a lot for posting it.. :good:
Click to expand...
hey i have some website and notes from this other forum
Module1
Biochemistry, cells, cell transport, exchange, enzymes & digestion.
Module2
Genetic code, cell cycle, sexual reproduction & gene technology.
Module3
Transport, breathing & heartbeat control, energy & exercise.
Module4
Photosynthesis, respiration, homeostasis, nervous coordination, muscles,
inheritance, variation, and evolution & classification.
Module5
Energy flow through ecosystems, material cycles, studying ecosystems,
dynamics of ecosystems and human activities.
Module8
Patterns of behaviour, reproductive behaviour, pregnancy, human growth
and development, human populations and health.

Module 1:

Code:
http://www.mediafire.com/?ta8z58q9dfjz5if

Module 2:

Code:
http://www.mediafire.com/?7kpx7kes5v3jix7

Module 3:

Code:
http://www.mediafire.com/?971n6q4gar116wb

Module 4:

Code:
http://www.mediafire.com/?7jow9hoh1ogqqgg

Module 5:

Code:
http://www.mediafire.com/?f34big5fdbhjbpc

Module 8:

Code:
http://www.mediafire.com/?ppx9str1i93y5jx


Combined AS + A2 notes i lke it
 
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filza94

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hey i hav studied all except those topicss cud u plzz telme for each wat extracly do we know???
 
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arsimme

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Can any body tell me definition of fluid musaic ? exact definition i want plz plz help me :)
 
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