Please help.


Nanyang 2009 SA1


Q13.
Please advise why 'B. Both of them have tails.' is not correct.


Q25.
Worksheet answer is (2) Angsana.

My answer is (3) Mimosa.

Which is correct?


TIA.

Hmmm...Q13. I disagree with the choice of 1,2,3 &4

A - Yes. Gills are a typical fish characteristics

B - No. The sea bass has a typical Caudal Fin or Tail Fin. The seahorse does not have a Tail Fin. It has a prehensile tail (like a monkeys tail for grabbing) which is not atypical fish characteristic

C - No. The seabass has scales which is a typical fish characteristics. The seahorse is an exeption. It does not scales. It hasa thin skin stretched over a series of bony plates arranged in rings throughout its body.

D - Perhaps. They both do live in the sea. However, not all animals that live in the sea are fishes. On the other hand, fishes are aquatic animals that either live in the sea or in fresh water. So a bit of a yes and a no. Strictly I would say 'no' to this. As it is a poor reasoning to draw a conclusion that it is a fish just because it lives in the sea.

So only "A" applies and all the answers 1,2,3 & 4 are NOT acceptable. Sorry Nanyang Primary

Q25.

Note it takes a very short time for E to fall to the ground compared to the others. E is heavier than Shorea. So it cannot be Mimosa and has to be Angsana.

sorry but isnt angsana supp to have wings which keeps it afloat in air longer??

Yup. My bad, I was mistaken.
I had thought the mimosa seed was light and feathery.
It is the mimosa flower which is ligth and feathery.
Just checked that the mimosa seed is more solid.