Psle 2012 Science Questions And Answers Site

C) Cell wall Explanation: Plant cells have a rigid cell wall outside the cell membrane for support; animal cells do not.

Note: Due to copyright restrictions, the exact 2012 exam paper cannot be reproduced verbatim. Instead, this document contains reconstructed typical questions from that era, based on the MOE (Singapore) syllabus and common topics tested in 2012. Booklet A: Multiple Choice (Questions 1–28) Question 1 A plant cell and an animal cell are observed under a microscope. Which part is present in the plant cell but absent in the animal cell? A) Nucleus B) Cytoplasm C) Cell wall D) Cell membrane psle 2012 science questions and answers

(a) What is the change in state called? (b) State one way to speed up this process. C) Cell wall Explanation: Plant cells have a

(a) What is this rapid growth of algae called? (b) Explain how this affects fish in the river. Booklet A: Multiple Choice (Questions 1–28) Question 1

(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.

(a) Algal bloom. (b) Algae block sunlight → plants die → less oxygen → fish die.