Which is not an example of natural selection? a
Giraffe necks getting longer over generations to better reach food sources.
b
Increase in dark frog population to blend in with environment.
c
Developing apples that have a longer shelf life at the store.
d
Plants that tolerate salt water better due to changing environment.

I think c

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

i hope this you