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<span>The muscle at the end of the esophagus is not able to close, which allows stomach acid and digested food to go back up into the esophagus. </span>
Answer:
A. glucose
Explanation:
In cellular respiration, electrons from glucose move gradually through the electron transport chain towards oxygen, passing to lower and lower energy states and releasing energy at each step.
Answer:
Echinoderms evolved from animals with bilateral symmetry. Although adult echinoderms possess pentaradial, or five-sided, symmetry, echinoderm larvae are ciliated, free-swimming organisms that organize in bilateral symmetry which makes them look like embryonic chordates.
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Explanation:
Answer:
Las células eucariotas tienen dos funciones primordiales, alimentarse y reproducirse. Las células eucariotas, al igual que las procariotas, llevan a cabo tres funciones esenciales: la nutrición, la relación con el medio y la reproducción. ... Célula con un núcleo definido por una membrana que contiene el material genético.
Explanation:
