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[Spy]:

--- Quote from: unknown 101 on May 15, 2010, 12:55:00 pm ---theyre probabely right but we gotta worry about the other questions which were for 4 and 5 marks :S

--- End quote ---


for the tubercolosis and malaria question i wrote that since malaria is transmitted through a mosquito then in tropical regions it would survive best due to suitable conditions but not anywhere else where as tubercolosis was only transmitted through droplets in the air and therefore required nothing more  than an overcrowded are for its widespread and since the world is overpopulated these days, then its widely spread. furthermore, vaccines mayhave proved more effecient against malaria. and finally that symptomless carriers can have the disease of tubercolosis and pass it on to other people with noticing, and there for not differntiating between carriers and uninfected people.


and for the vaccine question

i said that the vaccine contains an active but diseaseless form of the pathogen where the disease causing part is removed ( usually DNA or RNA) and that the protein coat is left so that the body recognises it and therfore creates memory cells for it so that as soon as the actual pathogen attacks again it is eliminated quickly before causing illness. i also said that mothers having a fetus in their wombs pass on these antibodies, meaning any antibodies the mom has made will be passed to the fetus and any diseases she encountered, the fetus will be completely immune against them and therefore generation after generation the disease will be completely eradicated

:D

unknown 101:
i think that u shouldve mentioned the anopheles female mosquito is the only type that can act as a vector for the plasmodium, and that these mosquitos grow in puddles of water which is usually found more in tropical areas than the rest of the world

[Spy]:
i said that but vaguely :)
i said tropical and that stuff, i hope i just loose a mark :)

yo what was the answer to the last question?

prove amino acids to the plant for protein synthesis right?

Alayna:
and what about why water is needed in plants?

and the rhizobium question? (i cant recall the qn)

also what are the alveoli addaptations?

[Spy]:
PROVIDE*




@alayna: i wrote: 1. as a solvent for transporting assimilates
                             2. prevent from over heating by transpiration
you can also write that it helps in turgidity or in photosynthesis :)

rhizobium provides plans with amino acids for its protein synthesis

and the alveoli adaptations i wrote, that it has a very high surface area to volume ration meaning max. diffusion
2. it has very thin walls meaning two things, one that diffusion can be very quick, and that its very close to red blood cell reducing distance for diffusion meaning its also a fast process. i also said aveoli cells may have few organelles to allow max space for air and therefore max. oxygen

:)

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