(Q).
If organs of waste make up the waste system, then organs of waste do what to the waste system? Answer choices: - harm them - stink up - make up - recovery - recycling - eat up - poop up - store
(A).
make up

(Q).
If competition can cause harm, then what can cause harm? Answer choices: - Sulfur dioxide - burning coal - Medical treatment - treats - Good feelings - cigarettes - competition - emissions
(A).
competition

(Q).
If starfish lack respiratory and excretory systems, then what lack respiratory and excretory systems? Answer choices: - fish - graptolites - starfish - waste - humans - barnacles - insects - ferns
(A).
starfish