1. d
2. b
3. c
4. a
i took this same quiz a while back
The organelle malfunctioning in this case is lysosome. They have powerful enzymes and acids to digest and recycle cell material so they remove waste from the cell.
I'm pretty sure it's igneous
Nitrogen must be converted into nitrates before organisms can use it. If soil lacks nitrogen fixing bacteria, then it has few nitrates for the plants to take in.