Explanation:
A wavefront is the long edge that moves, for example, the crest or the trough. Each point on the wavefront emits a semicircular wave that moves at the propagation speed v. These are drawn at a time t later, so that they have moved a distance s = vt.
Gradient of the line is m =-2/5
The main cause of the seasons is earths orbit since each time were in a new season the planet is facing the earth a different way which causes winter etc..
An electropherogram, or electrophoregram, is a record or chart produced when electrophoresis is used in an analytical technique, primarily in the fields of molecular biology or biochemistry.
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These genotypes can be used for:
genealogical DNA testing.
DNA paternity testing.
DNA profiling.
phylogenetics.
population genetics
hope this helped :)
