[cmimg]0/12627174_4SB4HOBN.png[/cmimg]

[size=4]Liam wanted to determine the effect of plants on the temperature of air in a room. He set up the experiment as shown below using three different colored walls. (X – represents plants on the vertical wall).[/size]



[size=4][cmimg]0/12627174_XH571EDW.png[/cmimg][/size]



[size=4]Which two setups should he use in his experiment?[/size]

[size=4]Rayver has a potted plant that had been placed in the dark for two days. He then tied a clear plastic bag with a substance which absorbs carbon dioxide around leaf A of his potted plant. [/size]





[size=4][cmimg]0/12627174_7ANZ6WWE.png[/cmimg][/size]



[size=4]Then he placed the potted plant in the sun for another two days before plucking leaf A and B to test for starch. The iodine solution turned dark blue on leaf B but remain yellowish brown on leaf A.[/size]



[size=4]Which of the following is the aim of Rayver’s experiment?[/size]

[size=4]The diagram below shows tiny openings called stomata found mostly on the underside of the leaves.[/size]





[size=4][cmimg]0/12627174_AUXDYM1Q.png[/cmimg][/size]



[size=4]Which one of the following describes the function of the stomata?[/size]

[size=4]Jessa set up an experiment, as shown in the diagram below:[/size]





[size=4][cmimg]0/12627174_65ZMEX62.png[/cmimg][/size]



[size=4]She prepared three similar set-ups and left them at three locations X, Y, and Z in her garden from 12noon – 1pm. She counted the number of bubbles produced by the hydrilla.[/size]





[size=4]The rate of photosynthesis of the hydrilla was different at X, Y, and Z. This was most likely caused by the amount of _____.[/size]