En Español
8 de dezembro de 2020
¿Sabías que… Aguas vivas – Nivel 2
Información publicada en Joca 162
… las aguas vivas no tienen huesos, cerebro ni corazón?
… sus tentáculos pueden medir 40 metros, el equivalente a seis ómnibus comunes alineados en fila? Pero no todas las aguas vivas tienen tentáculos.
… las mayores aguas vivas tienen cerca de dos metros de diámetro (distancia entre los bordes opuestos de un círculo), el doble de la altura media de un niño de cuatro años? Las menores miden solamente dos centímetros – o sea, son cien veces menores.
… un agua viva se puede dividir en dos aguas vivas completas? Ellas adquieren esa habilidad cuando se hacen adultas.
… algunas especies consiguen volver para la fase inicial de la vida en períodos de estrés? En esa fase, llamada pólipo, las aguas vivas no tienen tentáculos.
… 98% del organismo de estos animales está compuesto por agua?
… algunas aguas vivas brillan en la oscuridad? La táctica les sirve para distraer a los animales que se alimentan de ellas.
Fuentes: Biología Net, Ciclo Vivo, columna Dúvida Animal de la página de Joca, Diario de Biología y Planeta Biología.
Preguntas
1)¿Cuál de estas afirmaciones no es verdadera?
a) Las aguas vivas consiguen dividirse en dos.
b) Algunas aguas vivas brillan en la oscuridad.
c) Las aguas vivas no tienen huesos, boca y corazón.
d) Un tentáculo de agua viva puede medir 40 metros.
2) ¿Ya viste un agua viva? ¿Cómo fue esa experiencia?
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