It is C. Their population has increased.
The correct answer should be Gametes
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All cellular activities in living organisms use ATP as their source of energy. ATP is the shortened form of Adenosine Triphosphate. It is a nucleotide which is often referred to as the molecular unit of currency of intra-cellular energy transfer. It is produced during the process of cellular respiration, it is required in all living cells as a source of energy to be used in the processes which keep the organism alive.
The statement that influenza is a virus that changes over time due to mutations is TRUE.
Because of the mutation changes during time the influenza virus constantly adapts to the changes in the environment.
The virus can mutate it two ways: Antigenic Drift (gradual mutations in the genes) and Antigenic Shift (a sudden change in the surface of the virus).
Mars bc none other planet showed signs of life