Answer:
Spectroscopy
Explanation:
Spectroscopy is a tool that scientists typically use to determine the mass, structur and the temperature of stars or other objects within the observable universe.
In general, scientists take a spectrum of the object they observe using a spectrograph. It is based on the theory that the lines of absorption at a given wavelength are special for each element.
Hence, the correct answer is spectroscopy or spectrograph.
Sexual reproduction is characterized by two processes: meiosis, involving the halving of the number of chromosomes to produce gametes; and fertilization, involving the fusion of two gametes and the restoration of the original number of chromosomes. ... Once fertilization takes place, the organism can grow by mitosis.
Mitosis produces identical nuclei whereas meiosis 1 produces variations in that so, producing un-identical nuclei
Hope this helps!
