biology syllabuses (2 Viewers)

[pLuvia]

neone willing to share their preliminary bio syllabus notes with me.. i just want patterns in nature.. ill be happy to share with u my life on earth.. thx

 

[Guernica]

Well I just finished doing my Local Ecosystem dot points. Haha... I'm a little behind.

I've started Patterns in Nature.

 

[omigodwhenover]

I have nearly finished i have one more bit to go and then I will

 

[pLuvia]

hey can u guys help me wif this dot point...

Identify the general equation for aerobic cellular respiration and outline this as a summary of a chain of biochemical reactions
thx

 

[Guernica]

Umm well the equation is..
glucose + oxygen ---> carbon dioxide + water

and the second part I think just means you have to know and acknowledge that this is a summarized version of many chemical reactions.. (about 50, i think it is)
There are two main stages you may need to know... which I forget... it's like the breakdown of glucose... I dunno. Look in your notes.

 

[omigodwhenover]

The bit about the stages is that it occurs in two stages. The first stage results in the splitting of the 6-carbon sugar molecule into two 3-carbon molecules (called pyruvate). In this stage two molecules of ATP are gained.The second stage occurs in the mitochondria and results in the complete breakdown of the pyruvate into carbon dioxide and water and 36 molecules of ATP are gained. The energy is released gradually. Even though it occurs in these two stages it involves a series of chemical reactions (about 50), each one catalysed by a different enzyme.

Yeh thats straight out of heinemann biology on page 22. Hope it helps

BTW: the equation is glucose + oxygen = carbon dioxide + water + energy (ATP)

 

[pLuvia]

The bit about the stages is that it occurs in two stages. The first stage results in the splitting of the 6-carbon sugar molecule into two 3-carbon molecules (called pyruvate). In this stage two molecules of ATP are gained.The second stage occurs in the mitochondria and results in the complete breakdown of the pyruvate into carbon dioxide and water and 36 molecules of ATP are gained. The energy is released gradually. Even though it occurs in these two stages it involves a series of chemical reactions (about 50), each one catalysed by a different enzyme.

Yeh thats straight out of heinemann biology on page 22. Hope it helps

BTW: the equation is glucose + oxygen = carbon dioxide + water + energy (ATP)

oh ok is that it.. alritez i got that.. thx guys

 

[pLuvia]

 Examine trends in population estimates for some plant and animal species within an ecosystem

help on this dot point.. i duuno wat to write...

 

[pLuvia]

 Describe the role of decomposers in ecosystems

Decomposers are organisms that absorb nutrients from dead tissue or waste products and returns organic material to the soil. They also make materials produced by decomposition available to plants, which is then recycled into the food chains. Bacteria and fungi are usually the main decomposers in an ecosystem.

enough info?

 

[Guernica]

Yep, that's enough info. And yeah, I don't know about: Examine trends in population estimates for some plant and animal species within an ecosystem.... I'll see what I did. Umm I just talked about the cycle of predator/prey populations... like, with an abundance of prey, predators increase, and then prey decrease because less survive, so predators decrease... etc etc I don't know if that is right?

And my answer to Identify the general equation for aerobic cellular respiration and outline this as a summary of a chain of biochemical reactions was off the top of my head, so it wasn't that bad

 

[pLuvia]

ok thx.. i think that  Examine trends in population estimates for some plant and animal species within an ecosystem is prob a first hand experiment mayb... i dunno thx newayz

 

[omigodwhenover]

examine trends dot point is the one about quadrats and transects and i'm pretty sure it is a first-hand investigation which means a prac and you have to use quadrats and transects to measure distribution and abundance of a particular species in an are an examine the trends i.e preferred environmental factors. We had a whole excursion for this prac and a major assesment and it was shit boring. Good luck

 

[omigodwhenover]

and sorry guernica. your answer was very good i had to look up my text book to get the right answer

 

[pLuvia]

so for that dot point do i have to rite nething?? coz i put the quadrat and capture recapture thingy in distribution and abundance dot point or should i move it down to that dot point

 

[omigodwhenover]

yes, do you have heinneman bio book? its all in there. i will give it to you anyway:
Populations of organisms do not remain at a constant level within an ecosystem. Many factors affect thier numbers. When population numbers stay approx the same year after year = stable population/in balance. When population increases rapidly = population explosion. Population no.s also decline due to disease, predation, competition etc. Pop numbers also show cyclical changes due to vailability of food, weather/seasons, reproductive rates, predation levels etc. If an individual species shows regular fluctuations it may be because of changing availability of food, seasons, the animals reproductive cycle. And also the predator-prey cycle thing. The dot point says you have to examine the distribution and abundance in your chosen ecosystem and look for trends and try to explain them. (phew).

BTW: are you just studying or hasn't your school actually finished that yet? what bit are you up to?

 

[pLuvia]

yes, do you have heinneman bio book? its all in there. i will give it to you anyway:
Populations of organisms do not remain at a constant level within an ecosystem. Many factors affect thier numbers. When population numbers stay approx the same year after year = stable population/in balance. When population increases rapidly = population explosion. Population no.s also decline due to disease, predation, competition etc. Pop numbers also show cyclical changes due to vailability of food, weather/seasons, reproductive rates, predation levels etc. If an individual species shows regular fluctuations it may be because of changing availability of food, seasons, the animals reproductive cycle. And also the predator-prey cycle thing. The dot point says you have to examine the distribution and abundance in your chosen ecosystem and look for trends and try to explain them. (phew).

BTW: are you just studying or hasn't your school actually finished that yet? what bit are you up to?

just study notes.. lol.. we're up to life on earth ... so it that all that dot pt needs.??.. could u also help me with this dot point... i cant find it newhere.. n i dun think we learnt it... but i havea rough idea on it...

Describe and explain the short – term and long – term consequences on the ecosystem of species competing for resources

thx guys...

and also wif this dot point.. should i just list the things...

Identify the impact of humans in the ecosystem studied

- Land clearance and habitat destruction
- Erosion and loss of soil
- Salination and desertification
- Pollution of air, water and soil
- Fertilisers and pesticides
- Loss of biological diversity
- Exploitation and depletion of natural non – renewable resources
- Production of poisonous materials
- Introduction of new species of fauna and flora

ive got this so far.. should i elaborate on ne of them..

 

[YBK]

I don't do biology, but for an identify question, that is more than enough

 

[Guernica]

I haven't described or explained yet... just identified... I'm going back for details later:

Dot point 9
Describe and explain the short-term and long-term consequences on the ecosystem of species competing for resources.
Competition for resources: food, water, light, shelter, space.
Short-term
· Availability of resources decreases
· Population growth decreases
· If population decreases, resource may be able to build up again
Long-term
· If resources depleted * degredation of environment
· Extinction
· Evolution of a new species

And yeah, as for the the "identify" question, you only have to be able to name them like that, so thats good.

 

[pLuvia]

I haven't described or explained yet... just identified... I'm going back for details later:

Dot point 9
Describe and explain the short-term and long-term consequences on the ecosystem of species competing for resources.
Competition for resources: food, water, light, shelter, space.
Short-term
· Availability of resources decreases
· Population growth decreases
· If population decreases, resource may be able to build up again
Long-term
· If resources depleted �* degredation of environment
· Extinction
· Evolution of a new species

And yeah, as for the the "identify" question, you only have to be able to name them like that, so thats good.

hey thx.. where did u get this.. wat book do u use at skool.. we use heinnemann.. thats relaly.. guud i also use excel as a supplementary study guide

 

[YBK]

Maquarie > excel