Kepler's harmonic law states that the of the orbital period of a planet around the sun is proportional to the of the planet's orbital radius.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: