microscopy....drawings.....

[workinghard]

Hey workinghard!! It seems your really working hard!!
I am confused with one thing!
Is it true that in xerophytes; the lower epidermis lacks stoma and has a thick cuticle whereas the upper epidermis has stoma and has a thin cuticle??? Or is it vice-versa?? If m right, is it because, the leaves roll up to save water?? In your diagrams however, everything is just opposite from that of a xerophyte. Am i right???

well in xerophytes dere r stomata on the lower side and dey r in grooves and r dus sunken... yeah leaves roll up n da outer surface is exposed which hz no stomata ... dats wat i no... i ll post some xerophyte slides 2 ... hope dey lll help!

 

[workinghard]

thank you........sooo muchhhhh.........working hard ur plan drawings show a great amount of labelling....do we have to do that cos i dint saw anywhere to draw a labelled drawing....?

its written in ques ... sometimes dey say labels r not required but most of da time u hv 2 label da dia like princesszahra said
n yeah i mentioned earlier dese r loaded wid info for ur sake .... u jst tell wat tissue/ cell it is like palisade mesophyll lower epidermis n so on..

 

[XPFMember]

assalamoalaikum everyone!

@workinghard...if possible cud u paste all the pics u uploaded in MS word and attach it here.....hope it isn't a problem for u...it'll be more convenient i think
JazakAllah Khair!
may Allah bless u

 

[workinghard]

assalamoalaikum everyone!

@workinghard...if possible cud u paste all the pics u uploaded in MS word and attach it here.....hope it isn't a problem for u...it'll be more convenient i think
JazakAllah Khair!
may Allah bless u

i already posted al ihad n if u still in need of dem in ms word version pm 2 let me no i ll c wat i can do
da original slides doh are already in adobe !

 

[rz123]

Thanks a lot working hard. God bless u.

 

[Talha]

i want to know that when drawing plan diagram of a leaf , vil palisade layer be drawn bigger or smaller in size than da spongy layer ... and also vil we draw the upper part of da vascular bundle in palisade and lower part in da spongy layer?? Plz help asap...

 

[maissa93]

Well, i don't get one thing, all the names you've written, I've never even heard of them before.. =/
I mean all i know is there is this xylem and phloem..
Is this all relevant? And if so, can you please explain it to me? I'd be thankful.. =)

 

[filza94]

Hey all.. Yhe 4 2mrw We might have Urease... N Transverse Section of leaf.. Hopefully..

http://www.scienceinschool.org/print/607 a link realted to enzymes urease.....

Ok Duh we're getting urease & urea tomorrow in Bio 33, Now what wud be the Improvements, Sources of error & Limitations for the experiment below?
Enzyme Concentration

In this investigation, we will examine what happens to the rate of a reaction when the amount of enzyme is reduced. We will use urease, an enzyme that converts urea to ammonia. The ammonia causes the pH of the water to increase (it becomes more basic). You will be able to tell when a reaction occurs because the urea solution also contains a pH indicator that is becomes yellow in acid but turns red when the solution becomes basic.

The object of this experiment is to measure the amount of time it takes for the solution to turn red if less enzyme is used.

C1. Create a hypothesis regarding the the amount of urease and the rate of reaction of Urea.

C2. Obtain four test tubes and add 2 cm of urea to each.

C3. Label three of these tubes 1 through 3; the remaining tube will not be used; it will serve as a control.

C4. Have your lab partner start timing as you add 15 drops of urease to tube #1 and then swirl the tube until it changes to a red color. Record the amount of time that it took for the urease to change to a red color.

C5. Add 5 drops of urease to tube #2 and then swirl the tube until it changes to a red color. Record the amount of time that it took for the urease to change to a red color.

C6. Add 1 drop of urease to tube #3 and then swirl the tube until it changes to a red color. Record the amount of time that it took for the urease to change to a red color.

C7. Record your results in the answer sheet.

C8. Did using less enzyme produce a reaction?

C9. What was the effect of using less enzyme in your experiment? If your experiment did not work as expected, what should have happened?

C10. In general, what happens to the rate of reaction as the amount of enzyme is decreased?

C11. Do your results support your hypothesis? Explain.

 

[filza94]

http://www.xtremepapers.me/CIE/Internat ... 3_qp_5.pdf realated to enzyme urease...

 

[workinghard]

@maissa93 sory i didnt get which names r u talkin bout?
can u reask ur ques?!
n @talha u ll draw wat u c ... dats da most imp point... normally palisade layer is thinner den spongy but some times dere r 2 - 3 layers of palisade dat ll make it bigger
n vascular bundle is normally part in spongy part in palisde
again draw wat u see...
thin unbroken lines
labels aligned not runnin around madly everywhere n
donot attempt 2 overdo by drawing wat u no ll b dere!!!