Which sphere of earth includes the continents and the ocean floor? atmosphere biosphere geosphere hydrosphere
10

Geosphere

Explanation:

the continents are not hydrosphere or atmosphere, they are the geosphere. If you look closely into the question you can see that it talks about the ocean floor, not the ocean so atmosphere and hydrosphere are out. There is biosphere on the ocean floor and the continents, but bioshere is all living things and plants! At first i thouht it was biosphere, but then i realized that the ocean floor is made up of rocks, sand, and other minerals(geosphere), so it had to be geosphere, the same with the continents!

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: