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Chum salmon (oncorhynchus keta) are born in freshwater environments and then migrate to the sea near the end of their lives, they return to the freshwater stream where they were born to spawn. in freshwater, water constantly diffuses into the body and ions are lost from the body. in salt water, body water diffuses out of the body and excess ions are gained from the water. a salmon's gills have special cells to pump salt in or out of the body to maintain homeostasis. in response to the salmon's moves between freshwater and salt water, some cells in the gills are produced and others are destroyed. these changes made in the cells of the gills during the lifetime of an individual salmon are an example of ?
a. trade off
b. evolution
c. acclimatization
d. adaptation

Respuesta :

Acclimatization

Explanation:

Acclimatization is the process by which an organism  can adjust to the changes in its environment.

Acclimatization occur in short period of time within the life span of an organism.

Adaptations are traits that help an organism to survive efficienty in its native habitat. These are inheritable.

Evolution are changes that take place within a population after several generations.

Trade off refers to the phenomena in which existence of a trait necessarily depends on  elimination of another trait.

The given condition fits the definition of acclimitization.

So, the most suitable choice for answer is acclimatization.

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