Health vs Study
There seems to be an increasing rate of absentism for classes. To many who burnt the midnight oil to cramp a few more hours beware. You body needs a good amount of rest, especially when you are fully utilising your brains (i hope so).As such, please include in your study plan, a suitable amount of time for some light exercise (NOT long hours of soccer and basketball games) and have a good amount of sleep (~ 7 hours).
You do the maths, if you get sick because of squeezing the extra hours, you lose out in a few days of work. Plus, insufficient sleep leads to ineffective studying as well.
PS: Those who know this site, do intro to those who have spare time and have questions to ask.
MG
posted by MG-Biology @ 4:13 PM
8 Comments:
mr goh, i would like to ask something, actually i accept this concept as it is but i do not understand.
it is stated that only 10 percent of the energy does down every trophic level. yet however take for example this chain
leaf-caterpillar-bird-python-mongoose
it is apparent that the the bulk mass of the animal below it or rather the total mass which means the total energy content is high.so why does one food chain not be able to support 5 or more trophic levels?
freddy
sir, it is said that gaseous echange in the locust occurs at the fine endings of the tracheal system...this juz refers to the tracheoles right?
and sir, i have checked and found that u gave the answer as the outside of the membrane becomes less positive, whilst u said that the answer is more positive..so, which answer do we take? i am referring to nyjc prelims 04 mcq question 39
mr goh, wiF referenCe to energetiCs leCture nOtes pg 5.
comparison btw PSl anD PSll.. it is said tt in PSl the ejeCted electrons reduCe NADP anD aRe replaced by electrons from the ETC.. while in PSll the ejected electrons enter the ETC anD aRe replaced by electrons from splitting of h2o molecules..
i haf got 2 queries regarding this
..
1)are the lecturers implying that in PSl the ejected electrons dont enter the ETC? from my understanding... it's such tt the electrons actually enters the ETC and are transferred to protein ferredoxin before being used to reduce NADP.. is my concept wrong?
2)replacement of electron loss from PSl the same in both cyclic and non-cyclic phhotophosphorylation?
chunying~
mr goh.. is pancreas an endocrine oR BOTH endo anD exocrine gland? why is is said in some textbooks tt it is an endocrine gland yet contains BOTH endocrine anD exocrine cells.
-chunYing
pancreas is both
endocrine-insulin,glucagon
exocrine-pancreatic juice
Tracheoles = fine endings of tracheal system.
MG
Thank you freddy.
The answer is acceptable.
MG
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