Psle 2012 Science Questions: And Answers

Two identical bar magnets are placed on a table. When the north pole of magnet X is brought near magnet Y, magnet Y moves away.

C) Cell wall Explanation: Plant cells have a rigid cell wall outside the cell membrane for support; animal cells do not. psle 2012 science questions and answers

(a) What is the role of the grass in this food web? (b) If all frogs are removed, explain what will happen to the grasshopper population. Two identical bar magnets are placed on a table

(a) Is this complete or incomplete metamorphosis? (b) Name one difference between the larva and adult stages. psle 2012 science questions and answers

(a) Producer. (b) Grasshopper population will increase initially because there are no frogs to eat them.