Q&A - P3 Science

[htn]

hi, please help.

what is the answer for the following:
The ball of food that is formed after chewing is called the _____.
1.pulp
2.bolus
3.chyme
4.sphere

TIA

[corneyAmber]

htn:

hi, please help.

what is the answer for the following:
The ball of food that is formed after chewing is called the _____.
1.pulp
2.bolus
3.chyme
4.sphere

TIA

(2) bolus

http://en.wikipedia.org/wiki/Bolus_%28digestion%29

[htn]

ksi:

htn:

hi, please help.

what is the answer for the following:
The ball of food that is formed after chewing is called the _____.
1.pulp
2.bolus
3.chyme
4.sphere

TIA

(2) bolus


http://en.wikipedia.org/wiki/Bolus_%28digestion%29

Thanks

[corneyAmber]

For polar bear and fox, do you use fur or hair for their outer covering? (i.e. acceptable to marking scheme)


Or are they use synonymously and both accepted in marking?

[Champion]

ksi:

For polar bear and fox, do you use fur or hair for their outer covering? (i.e. acceptable to marking scheme)


Or are they use synonymously and both accepted in marking?

Ah Po! I think both are acceptable - according to the Ultimate Science Guide (Lower Block)
http://i56.tinypic.com/28kk708.jpg\">

[teh_oh]

Hi,


Appreciate some help here.

http://i51.tinypic.com/312ebfm.jpg\">

My queries:
1) Is mould a micro-organism? (Answer Key: 3)
2) How do bacterium reproduce?

Thank you.

[teh_oh]

Hi,


Another one.
http://i53.tinypic.com/bz8sk.jpg\">

My queries:-
1) can the above plant absorb water without roots? (Answer Key: R and S)
2) is this under Diversity or Systems topic?

Thank you.

[atutor2001]

teh_oh:

My queries:

1) Is mould a micro-organism? (Answer Key: 3)
2) How do bacterium reproduce?

1) Yes, mould is micro-organism. We cannot see micro-organism with our naked eyes but yet we can see mould. That is because what we saw are thousands of mould grouped together. We will not be able to see it if it is a single mould.

2) Bacteria reproduces by cell division. Mould is a fungi and it reproduces by spores.

[atutor2001]

teh_oh:

My queries:-

1) can the above plant absorb water without roots? (Answer Key: R and S)
2) is this under Diversity or Systems topic?

1) Plant can absorb water without roots. The water enters the xylem (water carrying tubes) in the stem because of (a) capillary action (b) transpiration. Capillary action is the attraction of water molecule to the cells in the xylem and pulling the water upwards. Transpiration is the evaporation of water through the stomata, and water moving up to fill the empty space on top.
Personally I feel that P & Q should also be correct answer because the amount of roots in both pictures are the same i.e. only 1 variable is changed (which is the number of leaves) and it is therefore a fair test. I guess R & S are better options because the set-ups eliminate any possibility of errors caused by the presence of roots.

2) I think this question is on experimental method & systems

[teh_oh]

atutor2001:

teh_oh:

My queries:

1) Is mould a micro-organism? (Answer Key: 3)
2) How do bacterium reproduce?

1) Yes, mould is micro-organism. We cannot see micro-organism with our naked eyes but yet we can see mould. That is because what we saw are thousands of mould grouped together. We will not be able to see it if it is a single mould.

2) Bacteria reproduces by cell division. Mould is a fungi and it reproduces by spores.

Hi atutor2001,

Thank you for the clarifications.
Two more thing, is mould then also a type of fungi?
And, do bacteria feed the same way as fungi? That is they feed on other dead or living organism by breaking them down and absorbing them.

Thanks again.