What will happen if a white crowned sparrow does not hear the song of its species?

The white-crowned sparrow must listen to and memorize other adult sparrow singing. It then copies the song it hears as well as it possibly can, then compare its own song with the one it memorized. If the sparrow doesn't hear the song at an early stage, then it can't memorize it and instead it creates it's own version of the song until it hears the adult song.

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many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.