Biology

What characteristic could show that a bird might be ready to reproduce?

More Questions from Biology
What are plants that grow, reproduce and die all in one season called?
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What would you call a group of organisms that is close to extinction?
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Which one of the following might a frog eat?
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What is group of cells that work together and form an organ called?
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Where are the carpals found in humans?
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What do trees lose in the start of winter weather?
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Bananas, cacao, and rice are grown in which climatic zone?
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Which digestive organ sends the broken-down nutrients out to the body?
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