Gel electrophoresis is a technique used to separate DNA fragments (or other macromolecules, such as RNA and proteins) based on their size and charge. Electrophoresis involves running a current through a gel containing the molecules of interest.
The answer is A- sperm and egg. gametes are reproductive cells in mammals, so sperm and egg would be the correct.
D. In a regimen of two to four drugs
Erosion can de-form/ruin landforms, & for sediment, it can erupt the rock cycle.
Hope this helped! :D