Its not allowed its a ruleWhy.?...
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A level Biology: Post your doubts here!
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ah, allright....
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https://www.xtremepapers.com/community/threads/biology-9700-p11-gt.33482/
GUYS VOTE HERE ABOUT YOUR EXPECTATIONS FOR BIOLOGY ''GT'' P11
GUYS VOTE HERE ABOUT YOUR EXPECTATIONS FOR BIOLOGY ''GT'' P11
Do you have excess to biology book of new edition.....you can find the ways for drawing plan diagram on the book......
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anybody done with their bio p4?
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Heeey guyss how was ur Paper's 1/1 and 5/1
WE're allowed to discuss now ....Come on lets check our answers together !
WE're allowed to discuss now ....Come on lets check our answers together !
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GUYS what was the answer for these questions in BIOLOGY/9700/paper 11
1- Which process is the least affected by a change in the fluidity of the membrane ?
2-What is the MINIMUM number of membranes that are crossed by oxygen and carbon dioxide molecules ?
3-some thing about the hemoglobin protein structure ( I think that which of the protein structures of the hemoglobin are codded by DNA or some ting like this )
1- Which process is the least affected by a change in the fluidity of the membrane ?
2-What is the MINIMUM number of membranes that are crossed by oxygen and carbon dioxide molecules ?
3-some thing about the hemoglobin protein structure ( I think that which of the protein structures of the hemoglobin are codded by DNA or some ting like this )
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well No. 1 I'm doubting .. I guess I did wrong
No. 2 ...I marked in which there were 5 membranes for oxygen ..
bcuz
1. Into the cell of the alveolus
2. Out of the alveolus
3. Into cell of the capillary wall
4. Out of the cell of the capillary wall and into blood plasma
5. Into the red blood cell.
And No. 3 I don't xactly remember the question :/
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Can someone please explain how polyploids are formed through hybridisation??
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who else gave paper 5 on friday (may 9th) ???
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Soooo like, should I expected AS stuff to pop up in my Paper 4?
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Not exactly, but yes, you should generally have your basic AS concepts clear.
Did you give paper 5?
i did...Not exactly, but yes, you should generally have your basic AS concepts clear.
Did you give paper 5?
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how was it?
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Polyploids is when the chromosome number of an organism increase to more than 2n, if the it is an odd no. eg 3n, 5n they are infertile as they cannot undergo meiosis as homologous paring of chromosomes cannot take place. If it is even then homologous paring can take place and therefore they are fertile
Hybridization is when two gametes of different species are allowed to fuse together to form an offspring eg, is a mule it is formed from a horse and a donkey. Hybridized organism are usually show more better characteristics of both the parents the mule shows both the characteristics of the horse and donkey
Hybridized individuals are always infertile as they cannot undergo meiosis, but sometimes during the formation of gametes they skip meiosis and the gametes have 2 sets of chromosomes ie, 2n. if two individuals who undergo this faulty division mate the resulting offspring is polyploids
If you have the biology application booklet it is explained the genetic engineering section
mine was variant 2...it was decent, not as expected..yours?
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This
[PA] explain how the anatomy and physiology of the leaves of C4 plants such as maize or
sorghum are adapted for high rates of carbon fixation at high temperatures in terms of:
• the high optimum temperatures of the enzymes involved
• the spatial separation of initial carbon fixation from the light-dependent stage
(biochemical details of the C4 pathway are not required);
And
outline the following examples of crop improvement by genetic modification and include any
associated detrimental effects on the environment or economy:
• herbicide-resistant oil seed rape
• insect-resistant maize and cotton
Explain this plz : S
[PA] explain how the anatomy and physiology of the leaves of C4 plants such as maize or
sorghum are adapted for high rates of carbon fixation at high temperatures in terms of:
• the high optimum temperatures of the enzymes involved
• the spatial separation of initial carbon fixation from the light-dependent stage
(biochemical details of the C4 pathway are not required);
And
outline the following examples of crop improvement by genetic modification and include any
associated detrimental effects on the environment or economy:
• herbicide-resistant oil seed rape
• insect-resistant maize and cotton
Explain this plz : S