Answer:
The peppered moths population declined becuase they could not blend in as well, until there was a gene mutation that favorably changed them all black becuase they could blend in when they were black.
Explanation:
i just had this question on edgunuity
True.
Abiotic factors are factors that are not living but can affect the living organisms (biotic).
For example, soil, temperature, water, etc. are all different kinds of abiotic factors.
hope this helps
Im not sure but if you think of it, the one that you didn't put any salt is a independent variable because it doesn't really rely on anything it doesn't have salt. The Dependent variable would be the 2nd and the 3rd cup because it doesn't have much salt but the 4th cup has lots of salt so its basically controlled. Hope it helps !