tips for bio atp..? :P

[daredevil]

Nope done .
Hey are there more then 4 steps to prepare a slide?

I know that

1.You need to stain
2.the glass and rubber band
3.prevent any airbubbles from forming
4.name of stain : i use iodine

Do check if this is correct and if anything needed to be added or subtracted.

rubber band??

lower the cover slip over the slide at an angle to prevent air bubbles from forming. when cover slip covers the slide then tap it to get rid of any air bubb;es present.
mop up any liquid (water or iodine or methyl blue stain) that seeps out the sides of the cover slip with a small piece of filter paper.
iodine is fine... but u can also use methyl blue.

 

[Ifrah Jackson]

HEyy guys i had some really good help from my teacher today.
first of all the chapters that are most likely to come are nutrition and transport in plants, nutrition in animals, nutrition, ecology/ecosystem, germination, genetics, micro-organisms, coordination and response (with locomotion and all).
other than that what i reccomend is that u go through all the INVERSTIGATIONS in the book and answer the observation questions. if u can't take help from someone... i did. those investigations cover prety much all of it. also go through the investifgations from the mary jones book. it has them in a bit better detail. and leaves little to be asked.
magnification is important. take care of when to include the multiplication factor and REMEMBER THER FORMULA.
Labelling is important especially for bones (humerus, scapula, radius and ulna), mucles (biceps and triceps), reflex action, germination (seed labelling of embryo, mesocarp, pericarp, epicarp, cotyledon, radicle, plumule, testa), skin, look at the other diagrams if u find somethin important.


exam tips are that
- first of all do all questions except graphs. leave graph for the end bcuz it takes time.
- determine from which topic the question has come.
-in graph questions determine which value should come on x axis and which one on y axis. (the linearly changing or known value comes on x axis mostly time and and unknown or chenging not on regular intervals comes on y axis). label axis (time; distance; etc) and also give units on the axes (/hours; /metres; etc.) draw best fit curve/straight line (as appropriate).
-what can be done to make the experiment more reliable:-
* repeat experiment to take average for accurate results
* take measurement at equal time intervals
* take the same amount of sample for each experiment
* keep other environmental factors constant
- designing experiment -- > these experiments mostly come from book so its better to get an understanding of the working of the experiments in the book.
- when boiling water mostly it is for removing O2. for example in the experimnet to test for the presense of stomata the water is first heated so as to remove the dissolved O2 from water. thus the bubbles when seen are only from the gaseous excchange through stomata.
-KOH --> dissolves CO2
NaHCO3 -- > provides CO2
- hydrogen bicarbonate indicator turns red in neutral; yellow in acidic and purple in alkaline solutions. so when CO2 is present in water the indicator turns yellow (carbonis acid)
- leaf is put in ethanol to remove chlorophyll (this makes the ethanol green and the leaf white)
- after heating with ethanol (in a water bath) a leaf is put in distilled water before testing to remove ethanol traces from it.

nyc thankx alot

 

[Ifrah Jackson]

oh wow thats some great advice
Learn the test for starch
Learn transpiration and factors effecting it
learn all experiments in plant section
Learn about seeds germination and look at all labelled diagrams
Learn the senses chapter and the one about the eyes and what not
Learn some general safety tips which you can use anywere
Remember in drawing a larger diagram , dram the one shown as accurate as possible and should take up to 3/4th of the given space . Also during magnification , take reading from the largest/longest side of the two diagrams . (Image/object x Magnification if given)
And yes remember plants can die due to diesease and animals .


A personal tip , don't be afraid to write the obvious , like if they ask about difference between two insects , mentioning they both have heads can get you marks :O .

nyc tips! thankx alot!

 

[daredevil]

nyc thankx alot

u're welcme

 

[khalil]

rubber band??

lower the cover slip over the slide at an angle to prevent air bubbles from forming. when cover slip covers the slide then tap it to get rid of any air bubb;es present.
mop up any liquid (water or iodine or methyl blue stain) that seeps out the sides of the cover slip with a small piece of filter paper.
iodine is fine... but u can also use methyl blue.

Yes you use rubber band to hold the cover slips . Any who , thanks for the answer .

 

[stareaj]

Paper clips work to no?

Yes you use rubber band to hold the cover slips . Any who , thanks for the answer .

 

[stareaj]

Graphs pls help
What's mesocarp and epicarp

 

[daredevil]

Graphs pls help
What's mesocarp and epicarp

ummm do u have redspot book of atp past papers? if yes then go to june 2006 paper and look up the answer of ques. 2) part c)i) and u'll find a diagram with this labelling. hope i helped!!

heyy guys help me too ... are we alowed to write in points the answer of a 2-4 marks question. e.g. differences or appearence or some ques. like that where we need to give more than 2 points of the same thing. get my point>?

 

[farahdar]

Graphs pls help
What's mesocarp and epicarp

Pericarp is of 3 layers : epicarp, mesocarp and endocarp..in case of a mango epicarp is the skin of the mango, mesocarp is the stored food (fleshy part) and endocarp is the hard part in which the seed it..

 

[farahdar]

what sorta stuff can come from microorganisms?

 

[khalil]

ummm do u have redspot book of atp past papers? if yes then go to june 2006 paper and look up the answer of ques. 2) part c)i) and u'll find a diagram with this labelling. hope i helped!!

heyy guys help me too ... are we alowed to write in points the answer of a 2-4 marks question. e.g. differences or appearence or some ques. like that where we need to give more than 2 points of the same thing. get my point>?

no your not allowed to write in points for 2-4 marks question at any point , though ive been told , if in extreme hurry you can write .

 

[kirann]

v

Oh yes test for viscosity of liquids is to measure time take by it for falling from a burrete.
Also learn about enzymes and the diagrams related to it .
Always remember for food test , first mash and grind it , or bring it in liquid form and do write '' repeat and take average '' were it can be written "
Learn names of 2 plants for the heck of it .

And Allah sa dua kuro ''Ya Allah , Imteehaan please asaaan ho''

whats the experiment for viscosity?

 

[Lilly2318]

can someone guide me to the notes of locomotion and teeth