<span>Animals and plants have cells that are specialized by the process of differentiation.</span>
<span>The word promixodistal comes from Latin terms meaning "away from the center". This refers to the stage of development where growth occurs from the center of the body to the extremities. For example, an infant learns to use its arms and legs first (to crawl), then its hands (to reach and grasp), and finally its fingers (to pick up and use objects).</span>
Mediante la fotosíntesis, las plantas transforman el CO2 atmosférico, o del agua, en materia orgánica (carbohidratos, lípidos, proteínas y ácidos nucleicos), de la que se alimentan los seres vivos a través de las cadenas alimentarias, donde pasa a formar parte del cuerpo de estos seres vivos.
