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Nalash3ayHuskater
Nalash3ayHuskater Nalash3ayHuskater
  • 17-05-2016
  • Biology
Answered

Birds migrate great distances each year and the primary cue for migration are changes in day length. These changes in day length in turn trigger ___________ changes in the birds. Behavior and body changes follow as the birds prepare for their seasonal migrations.

Verified Answer :

alittledead18 alittledead18
  • 19-05-2016

The answer would be hormonal because it's talking about it's behavior. And it's very common with humans and such.

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