Qualification > Sciences
Biology Paper 1 and 3 help HERE ONLY!!!
monnie:
can sum1 pls answer
Thanks
Feva:
--- Quote from: monnie on June 07, 2009, 10:36:07 pm ----wt are the functions of water?
- wt is the importance of osmosis?
-why does active transport occurs even though we hv diffusion?
pls answer quick i think um gona pass out
--- End quote ---
hehe hold on there ^^
--
-What are the functions of water.
* our cells are mostly water , used to transport stuff around the body.. keeps cells turgid in plants.. cant think of more
-important of osmosis.
*cells draw water in by osmoses to keep there cells turgid and healthy
-why does active transport occurs even though we hv diffusion?
* active transport is against the concentration gradient from low concentation to high concentration.
example: when a plant takes in nitrate ions from the soil .. they take them from the soil althu the concentration in the soil is lower than the plant. Active transport needs energy so more respiration needed
igcsezindabad:
i would strongly advise you to revise 'how does wilting occur'
nitrogen cycle
protien synthesis
antagonistic muscles and asexual/sexual reproduction.
seend dispersal- wind/insect
everything possible about the placent and homeostasis
this is all i remember.
hope it is helpful
thank me later if it rings a bell while u do the exams :)
cheers.
igcsezindabad:
* placenta
monnie:
--- Quote from: Feva on June 07, 2009, 10:43:35 pm ---
--- Quote from: monnie on June 07, 2009, 10:36:07 pm ----wt are the functions of water?
- wt is the importance of osmosis?
-why does active transport occurs even though we hv diffusion?
pls answer quick i think um gona pass out
--- End quote ---
hehe hold on there ^^
--
-What are the functions of water.
* our cells are mostly water , used to transport stuff around the body.. keeps cells turgid in plants.. cant think of more
-important of osmosis.
*cells draw water in by osmoses to keep there cells turgid and healthy
-why does active transport occurs even though we hv diffusion?
* active transport is against the concentration gradient from low concentation to high concentration.
example: when a plant takes in nitrate ions from the soil .. they take them from the soil althu the concentration in the soil is lower than the plant. Active transport needs energy so more respiration needed
--- End quote ---
dnt need to remember more these r enuf...i guess and wn i said i'll pass out it's a metaphor bec my back is killing me as i hv been studying for more than 9 hours now
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