Complete AS Biology Notes (P1 and P2)

[haha101]

I don't take physics sorry :/ Chemistry, at the moment all my notes are on paper, and since i have no scanner, it means I have to type them onto the computer which would take a while. I'm still unsure if I'll be able to upload them..

only the ones for P1 chem please .

 

[HubbaBubba]

only the ones for P1 chem please .

The notes are for both p2 and p1, since it's all from the same syllabus. I'll try and see if i can type them after the bio exam tomorrow

 

[haha101]

The notes are for both p2 and p1, since it's all from the same syllabus. I'll try and see if i can type them after the bio exam tomorrow

Ohk thanks . n good luck for tomorrow

 

[Gimmick]

1.The water in the root hairs crosses the cortex and enters the xylem. There are two ways, the apoplast and symplast method. Usually the symplast pathway is chosen. When water reaches the stele, it automatically reverts to the symplast because the endodermis has a casparian strip which acts as a barrier.

Is this a mistake...or a redundancy?

 

[lenin]

btw for anaphase you have to mention that sister chromatids move to opposite poles and that centromeres divide

 

[HubbaBubba]

Is this a mistake...or a redundancy?

Hmm it seems I forgot one line. It should say: "When water reaches the stele, if the apoplast pathway is chosen, it automatically reverts to the symplast because the endodermis has a casparian strip which acts as a barrier.

 

[HubbaBubba]

btw for anaphase you have to mention that sister chromatids move to opposite poles and that centromeres divide

Anaphase: Chromosomes split at centromere, and are pulled to opposite poles by centromeres by microtubules.
Since it's not clear enough, I'll change it then. I assumed that people would get that the centromeres and chromatids are seperated

 

[Gimmick]

Also, another note (I don't think it's required, but just in case) : Epithelium

Types of epithelium: Simple squamous, stratified, columnar, pseudostratified and transitional.
What type lines the trachea? Pseudostratified
What type lines the blood vessels? Simple squamous (The clue comes from "the endothelium of the blood vessels is flat to reduce friction -- simple squamous epithelium is flat)
Speaking of which, there's a whole list of questions and answers of them here

Also, does gaseous exchange require you to describe the function of the diaphragm?

 

[HubbaBubba]

Also, another note (I don't think it's required, but just in case) : Epithelium

Types of epithelium: Simple squamous, stratified, columnar, pseudostratified and transitional.
What type lines the trachea? Pseudostratified
What type lines the blood vessels? Simple squamous (The clue comes from "the endothelium of the blood vessels is flat to reduce friction -- simple squamous epithelium is flat)
Speaking of which, there's a whole list of questions and answers of them here

Also, does gaseous exchange require you to describe the function of the diaphragm?

They ask this stuff? :I I haven't seen a question in any past papers about this :O AHHHHH

 

[dark_ruller1996]

Thanks fr the notes

 

[lenin]

hey guys does anyone have an idea about biology p34 am so scared :s

 

[Gimmick]

hey guys does anyone have an idea about biology p34 am so scared :s

Most likely they'll ask you to view stuff through a microscope, draw a plan diagram, and write their features, calculate the magnification, also perform some food tests. Then again that's for p33, so idk.

 

[HubbaBubba]

Bump! Nearly forgot about this. In case people need more revision before Wednesday