BIOLOGY QUESTIONs...POST ALL QUESTIONS HERE

[Silent Hunter]

Hey people there are many topics on biology asking different questions............what i think is its better to have all of them in one post ........... so put ur questions here ........... so that others also dont have difficulty to find the thread they are looking for.

POST ALL QUESTIONS REGARDING THEORY OR MCQ SO THAT EVERY BODY CAN DISCUSS IT

 

[Silent Hunter]

Re: BIOLOGY QUESTIONS

I HAVE A QUESTION IN http://www.xtremepapers.me/CIE/Cambridg ... _qp_22.pdf

HOW TO DO 5(a) ?

 

[abcde]

Re: BIOLOGY QUESTIONS

AoA!
Maybe it's like this. I'm not sure, though. =S
Hope someone else would look into this, too.

 

[abcde]

Re: BIOLOGY QUESTIONS

How are antibiotics purified after being extracted from fermenters?

 

[sksuriza]

Re: BIOLOGY QUESTIONS

crystallisation

 

[abcde]

Re: BIOLOGY QUESTIONS

That's the method of extraction! How are antibiotics PURIFIED after that?

 

[Silent Hunter]

Re: BIOLOGY QUESTIONS

is it required by our syllabus?

one other simple question : IS BRAIN INVOLVED IN THE REFLEX ACTION?

IF NOT THEN WHAT DOES RELAY NEURONES DO? PASS IMPULSE TO MOTOR ONE?

 

[sksuriza]

Re: BIOLOGY QUESTIONS

crystallisation produces PURE antibiotics.....

havent u learnes in chem crystallisation is used to get pure samples????

 

[sksuriza]

Re: BIOLOGY QUESTIONS

is it required by our syllabus?

one other simple question : IS BRAIN INVOLVED IN THE REFLEX ACTION?

IF NOT THEN WHAT DOES RELAY NEURONES DO? PASS IMPULSE TO MOTOR ONE?

brain not involved

the relay neurone pass inpulse within spinal cord to the motor or efffector neurone.. to the effector

 

[Muhammad Talha]

Re: BIOLOGY QUESTIONS

That's the method of extraction! How are antibiotics PURIFIED after that?

I think that we don't need to elaborate that how it is purified...we have to only mention it...

 

[princesszahra]

Re: BIOLOGY QUESTIONS

That's the method of extraction! How are antibiotics PURIFIED after that?

I think that we don't need to elaborate that how it is purified...we have to only mention it...

right!!

 

[Muhammad Talha]

Re: BIOLOGY QUESTIONS

That's the method of extraction! How are antibiotics PURIFIED after that?

I think that we don't need to elaborate that how it is purified...we have to only mention it...

right!!

 

[abcde]

Re: BIOLOGY QUESTIONS

The brain is involved in some cranial reflexes such as the blinking of the eye when a hand is waved in front of it, salivation when food is in the mouth, the tearing reflex, the pupil reflex etc.

 

[sksuriza]

Re: BIOLOGY QUESTIONS

correct

 

[abcde]

What disadvantages does a pyramid of numbers have?

 

[sksuriza]

wt do u mean by tht?

 

[Nibz]

@ abcde => Difficulty in counting small organisms that are found in large numbers!
=> Problems of classifying and grouping organisms into their trophic levels.

 

[Muhammad Talha]

plz help me in Q.5 (d)(ii) of this ppr http://www.xtremepapers.me/CIE/Cambridg ... 8_qp_2.pdf

 

[sksuriza]

1.sex in reptiles determined by temperature
2. the x n y chromosomes account for sex in man
3.reptiles male developesd at temp 31-36 while in human 37 c normal body temp

 

[Muhammad Talha]

Don't u think that the 1st n 2nd would be one point???