biology syllabuses (1 Viewer)

[omigodwhenover]

all the answers i gave you were straight out of excel theyre all in there and the dot points are listed at the start of each chapter. So you are revising the local ecosystem chapter? dod you do the test in excel? its so hard i would have failed it but i am still coming first in my year? What skool do you go to?

 

[pLuvia]

all the answers i gave you were straight out of excel theyre all in there and the dot points are listed at the start of each chapter. So you are revising the local ecosystem chapter? dod you do the test in excel? its so hard i would have failed it but i am still coming first in my year? What skool do you go to?

'
ound it in my excell book ahahhaa thx

 

[pLuvia]

excels explanation of capture recapture is non understandable..

its so screwed...

esitmated pop. = total of taggin 1 x total of taggin 2 / total recapture

and this is their answer for the multiple choice Q8

EP = t1 x T2 / TR
= 50 x 50/5
= 50 x 10
= 500...

i dun get wat the T1 is.. the T2... can neone help plz

 

[Guernica]

T1 is the first sample taken, T2 is the second.

So it's like the first sample X the second sample/ total recapture.

Hmmm... that sounds kind of complicated... this is in my notes:
Total population = number of animals tagged x number of animals recaptured / Average number of tagged animals recaptured

I get all of my notes basically out of my class notes. My teacher rocks. Then I also have an excel book which I rarely use.

 

[pLuvia]

T1 is the first sample taken, T2 is the second.

So it's like the first sample X the second sample/ total recapture.

Hmmm... that sounds kind of complicated... this is in my notes:
Total population = number of animals tagged x number of animals recaptured / Average number of tagged animals recaptured

I get all of my notes basically out of my class notes. My teacher rocks. Then I also have an excel book which I rarely use.

is the average number of tagged animals recaptured.. the first amount tagged + second amount tagged / 2??

 

[Guernica]

Umm yes I suppose so

 

[omigodwhenover]

i was just doing this the other day. My explanation is:
A sample of the population is caught, tagged and then released. After a while another sample is taken from the same area is taken and the proportion of tagged animals in this sample is used to work out the population of the entire area. And in General Maths the formula we got taught for capture-recapture is a lot easier (even tho i forget it) But a bit of advice: we had a capture-recapture question in our half-yearlies and even though i got all the working right i only got one mark because i did not write out my equation in words as well as numbers which apparently you have to do

 

[pLuvia]

Describe evidence to support the cell theory

The development of light microscopes and electron microscopes has allowed living cells and organelles to be observed. The evidence to support the cell theory comes from direct observations of cells using these microscopes.


Identify cell organelles seen with current light and electron microscopes

Light microscope Electron microscope
Uses light to view Uses electron beams to view
Low resolution High resolution
Low magnification High magnification
Can view active organisms Organism must be dead
Cannot see internal structures Can see internal structures

Organelles you can see through:

Light microscope
- Vacuole
- Nucleus
- Cytoplasm
- Chloroplasts
- Cell wall
- Cell membrane
Electron microscope
- Mitochondria
- Golgi body
- Endoplasmic reticulum (S and R)
- Libosomes
- Lysosomes

i dunno if thhis is enuff info all the Describe evidence to support the cell theory dot point.. and should i put the differences of the pight and elecron microscope in that dot point or not?

 

[Guernica]

For those two, I have...

Dot point 2
Describe the evidence to support the cell theory.
1. Theory of spontaneous generation (the theory that life comes from non-living matter) disproved by:
(a) Redi (1660s) – maggots came from meat only after flies had visited the meat.
(b) Pasteur (1870s) – micro-organisms came from other micro-organisms.
2. Improvement of microscopes
3. Identification of cell organelles by electron microscopes
4. Discovery of cellular processes eg cell division

Aaaand... I haven't done dot point 4 yet. That is plenty though... it's only asking to identify the organelles.

 

[pLuvia]

Discuss the significance of technological advances to developments in the cell theory
how bout this one.. is it the microscopes their talking about?

 

[pLuvia]

For those two, I have...

Dot point 2
Describe the evidence to support the cell theory.
1. Theory of spontaneous generation (the theory that life comes from non-living matter) disproved by:
(a) Redi (1660s) – maggots came from meat only after flies had visited the meat.
(b) Pasteur (1870s) – micro-organisms came from other micro-organisms.
2. Improvement of microscopes
3. Identification of cell organelles by electron microscopes
4. Discovery of cellular processes eg cell division

Aaaand... I haven't done dot point 4 yet. That is plenty though... it's only asking to identify the organelles.

*reps all around.. *

 

[omigodwhenover]

Thanks, helping you helps me though as teaching people helps you learn. And plus u also helped me because it made me think: hey maybe i should go back and revise all that boring stuff in the first chapter!

 

[pLuvia]

Thanks, helping you helps me though as teaching people helps you learn. And plus u also helped me because it made me think: hey maybe i should go back and revise all that boring stuff in the first chapter!

Discuss the significance of technological advances to developments in the cell theory

would u no wat to rite in this one.. i think its the microscopes.. but not sure

 

[omigodwhenover]

yes im preddy sure thats it cuz i had that in my exam and all i wrote is the development of microscope and technological advances in lens construction have led to an increased understanding of cells and the development of the cell theory. Improved magnification and resolution of magnifying devices has allowed greater detail of cell ultrastructure to be seen. Thats just completely off the top of my head, pretty good!

 

[pLuvia]

Identify some examples that demonstrates the structural and functional relationships between cells, tissues, organs, and organ systems in multicellular organisms

Unicellular – Single celled
Multicellular – Many cells
Cells in multicellular organisms are specialised to do different things therefore showing different structures.



Cells (Muscle cells)
A collection of similar cells makes a tissue

Tissue (Stomach tissue)
A collection of similar tissues makes an organ

Organs (Stomach)
Organs working together with particular functions form an organ system

Organ systems (Digestive system)
Many organ systems make up an organism

Multi – cellular organism


this ok?? theres suppose to be arrows linking those things together...

 

[pLuvia]

Explain the relationship between the shape of leaves, the distribution of tissues in them and their roles

Palisades cells – cells that photosynthesise
Lamina – the blade of the leaf
Petiole – the thing that joins the leaf to the stem

The shape of the leaf and distribution of tissue depends on the environment in which the plant lives i.e. a dry terrestrial plant will have different distribution of tissues than an aquatic plant. Terrestrial plants have large numbers of chloroplasts in special photosynthesising cells called palisade cells, the arrangement of palisade cells vary in different plants to utilise the light available.
The arrangement of leaves is usually along the stems of plants in a way that exposes them to the maximum amount of sunlight, usually at an angle so that the sunlight strikes the upper surface of the leaves.
The shape of most leaves is broad, thin and flat; this gives them a large surface area for the capture of sunlight and for the process of photosynthesis and respiration.

this ok??

 

[pLuvia]

Describe the role of teeth in increasing the surface area of complex foods for exposure to digestive chemicals

Amylase – Enzymes that break down carbohydrates
Protease – Enzymes that break down proteins
Lipase – Enzymes that break down lipids

Digestion begins in the mouth where teeth break the complex food into smaller pieces, this increases the surface area for exposure to digestive chemicals i.e. enzymes. Saliva then lubricates the food and the amylase digests starch to maltose.

how much more can i write on this.. i cant find nething else..

 

[YBK]

lol, do a physics and chemistry thread like this and i'd be able to help/recieve help ....

 

[omigodwhenover]

Identify some examples that demonstrates the structural and functional relationships between cells, tissues, organs, and organ systems in multicellular organisms

Unicellular – Single celled
Multicellular – Many cells
Cells in multicellular organisms are specialised to do different things therefore showing different structures.



Cells (Muscle cells)
A collection of similar cells makes a tissue

Tissue (Stomach tissue)
A collection of similar tissues makes an organ

Organs (Stomach)
Organs working together with particular functions form an organ system

Organ systems (Digestive system)
Many organ systems make up an organism

Multi – cellular organism


this ok?? theres suppose to be arrows linking those things together...

I think this is the one how you have to look at specialised cells e.g. red blood cells and relate the structure to the function e.g. sperm cells have a large head to attch to the egg, the middle section contains many mitochondria for movement and they have a tail which propels them forward

 

[omigodwhenover]

Explain the relationship between the shape of leaves, the distribution of tissues in them and their roles

Palisades cells – cells that photosynthesise
Lamina – the blade of the leaf
Petiole – the thing that joins the leaf to the stem

The shape of the leaf and distribution of tissue depends on the environment in which the plant lives i.e. a dry terrestrial plant will have different distribution of tissues than an aquatic plant. Terrestrial plants have large numbers of chloroplasts in special photosynthesising cells called palisade cells, the arrangement of palisade cells vary in different plants to utilise the light available.
The arrangement of leaves is usually along the stems of plants in a way that exposes them to the maximum amount of sunlight, usually at an angle so that the sunlight strikes the upper surface of the leaves.
The shape of most leaves is broad, thin and flat; this gives them a large surface area for the capture of sunlight and for the process of photosynthesis and respiration.

this ok??

yes but its more the internal structure of the leaf rather than the outside:
cuticle: prevents water loss
veins: transport materials and maintain structure of leaf
palisade mesophyll cells: contain many chloroplasts for photsynthesis
spongy mesophyll cells: large spaces between them for gas exchange
stomata: site of gas exchange on underside of leaves

i think thats it