[size=4]Maya filled 3 identical tanks with equal amount of water and same amount of oxygen. She placed the tanks in a brightly lit room with different numbers of plants and fish.[/size]



[size=4][cmimg]0/12627174_8YNUWZ7P.png[/cmimg][/size]

[size=4]After 3 hours, she measured the amount of dissolved oxygen in the water in Tank Q. [/size]



[size=4][cmimg]0/12627174_LSR27WIN.png[/cmimg][/size]

[size=4]Which of the following would be the correct amount of dissolved oxygen in the water in Tanks P and R after three hours?[/size]

[size=4][cmimg]0/12627174_JZ3VCG15.png[/cmimg][/size]

[size=4]Jaime wanted to find out the conditions needed to slow down the rate of decomposition. He carried out the following experiment using three fresh mushrooms in each of the flasks A, B, C, D and E. He kept the mushrooms in different conditions. [/size]



[cmimg]0/12627174_0Z23X695.png[/cmimg]

[size=4]After one week, he recorded his observations in the table as shown below.[/size]

[size=4][cmimg]0/12627174_R052DBYC.png[/cmimg][/size]

[size=4]Based on his findings above, which one of the following conditions would slow down the rate of decomposition?[/size]

[size=4]Scientists are studying the effects of variable X on the growth of tomato plants. They plant identical tomato seedlings in pots with the same soil and give them the same amount of water. They use a different fertilizer for four of the seedling groups and no fertilizer for the other group. What is variable X in this experiment? [/size]

[size=4]Two cells X and Y are shown below: [/size]



[size=4][cmimg]0/12627174_H1UCYFBG.png[/cmimg][/size]

[size=4]Which of the following gives the correct classification of the cells and the function of Part A?[/size]



[size=4][cmimg]0/12627174_ND20NL95.png[/cmimg][/size]

[size=4]The diagram below shows what Zeny eats for dinner.[/size]



[size=4][cmimg]0/12627174_9IV411ET.png[/cmimg][/size]

[size=4]Her friends, Aki, Von, Ciara and Demi made the following statements:



Aki: Animals are the main source of energy.

Von: The energy in the food that Zeny eats comes from the Sun indirectly.

Ciara: Zeny eats in order to get energy to carry out life processes.

Demi: Energy is transferred from the Sun to plants and then to animals.



Who made the correct statements? [/size]