The answer is C where the star is found in the sky. If a star is moving toward us, its spectroscopy will be observed at shorter wavelengths, this is called "blueshifted". If the star is moving away from us, the lines will appear in longer wavelengths, and that's called "redshifted".
Sorry for a late response, but I hope this helped.
Answer:
The correct option is: A) Complementation test
Explanation:
Complementation test is used for determining that the mutations in the two strains, associated with a particular phenotype, are present in different genes.
The mutations are said to be complementary, if present in different genes.
Therefore, the complementation test is the process for <u>determining the function of the gene in recessive allelism. </u>