Which of the following statements about the global phosphorus cycle is true? a) Some phosphorus applied to crops as fertilizer leaves the terrestrial subsystem.
b) The bulk of Earth's phosphorus is found in deep ocean waters.
c) Fertilizers have decreased phosphorus availability in terrestrial ecosystems.
d) The mining of phosphate ore is an insignificant source of phosphorus for fertilizers.

compost can be added to topsoil as a:

pesticide

the fossil record provides evidence of a common ancestor to many species.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.