Psle 2012 Science Questions And Answers Today

(a) Name one structure seen in the onion cell but not in the cheek cell. (b) What is the function of the nucleus?

(a) No sunlight → no chlorophyll produced. (b) Food stored in the seed (cotyledons). psle 2012 science questions and answers

A factory releases hot waste water into a river. Algae in the river grow rapidly. (a) Name one structure seen in the onion

(a) What is this rapid growth of algae called? (b) Explain how this affects fish in the river. psle 2012 science questions and answers

Which of the following is an example of a chemical change? A) Melting butter B) Frying an egg C) Dissolving sugar in water D) Tearing paper