Q&A - PSLE Science

[whitety]

When my dd came back from school, I asked her how many stages of life cycle does a cat have? She said her school teacher taught her that a cat can have 2 or 3 stages, both answers are acceptable.


So now i’m confused too!

[savoury sweet]

whitety:

When my dd came back from school, I asked her how many stages of life cycle does a cat have? She said her school teacher taught her that a cat can have 2 or 3 stages, both answers are acceptable.


So now i'm confused too!

I asked my DD, this was what she said \" Adult, Egg, Young\" Well, I asked her to confirm with her Science teacher tomorrow.

[Niedino]

Hi Ms Lim,


The correct answer is 3. The current science syllabus teaches that there are 3 or 4 stage life cycles. Mammals like the cat have a 3 stage life cycle, just that the egg hatches in the womb and the young is born alive.

The tadpole does not moult and does not eat insects, so (2) and (4) are out. Only A and C are possible.

Hope this helps!

Niedino

[Michaelia0816]

My answer is 3, do consider it

[ms_lim]

Niedino:

Hi Ms Lim,


The correct answer is 3. The current science syllabus teaches that there are 3 or 4 stage life cycles. Mammals like the cat have a 3 stage life cycle, just that the egg hatches in the womb and the young is born alive.

The tadpole does not moult and does not eat insects, so (2) and (4) are out. Only A and C are possible.

Hope this helps!

Niedino

Thx Niedino, savoury sweet, whitety and Michaelia0816 for sharing your views. My ds also says cat has 3 stage life cycle.

I did a search on moulting at Wikipedia and it says :
http://i50.tinypic.com/34pifet.png\">
So frog moults?

[whitety]

ms_lim:

Niedino:

Hi Ms Lim,


The correct answer is 3. The current science syllabus teaches that there are 3 or 4 stage life cycles. Mammals like the cat have a 3 stage life cycle, just that the egg hatches in the womb and the young is born alive.

The tadpole does not moult and does not eat insects, so (2) and (4) are out. Only A and C are possible.

Hope this helps!

Niedino

Thx Niedino, savoury sweet, whitety and Michaelia0816 for sharing your views. My ds also says cat has 3 stage life cycle.

I did a search on moulting at Wikipedia and it says :
http://i50.tinypic.com/34pifet.png\">
So frog moults?

Yes. Frog moults. I didn't know about this too until I googled and found some videos showing the process of the frog moulting. Both me and dd learnt something new from your qn. Thanks!

[savoury sweet]

G Tan:

ms_lim:

Can help me with the question below :


http://i47.tinypic.com/2zfvjv7.jpg\">
Ans key is 3

Answer is 4

My DD just got back from school and had it confirm with her Science teacher :Cat has 3 stages of life cycle ie egg, kitten and cat and frogs moult.

[G Tan]

savoury sweet:

G Tan:

[quote=\"ms_lim\"]Can help me with the question below :


http://i47.tinypic.com/2zfvjv7.jpg\">
Ans key is 3

Answer is 4

My DD just got back from school and had it confirm with her Science teacher :Cat has 3 stages of life cycle ie egg, kitten and cat and frogs moult.[/quote]How can the teacher say that.....cat has no 3 stages, it's internal fertilization

[Michaelia0816]

Cats do not have 3 stages, eg like human, why we are instead called as 2 stages but no 3 stages, since we also started as egg, the egg is … Internal fertilisation . Pls tell your turor that she or he is wrong, should check the TB!

It doesn’t make sense at all!

[G Tan]

Michaelia0816:

Cats do not have 3 stages, eg like human, why we are instead called as 2 stages but no 3 stages, since we also started as egg, the egg is ..... Internal fertilisation . Pls tell your turor that she or he is wrong, should check the TB!

It doesn't make sense at all!

I like that