Answer: C. polyp
Explanation: The polyp is a sac-like stage of a cnidarian, with the mouth and tentacles on top.
An obligatory parasite is a parasite that can not complete its life cycle without exploiting a suitable host
Aids is one of the disease that damage little by little the immune system until the human body die.
Sirius B is brighter than the sun.
Answer:
Una variable de control (o constante científica) en la experimentación científica es un elemento experimental que es constante y sin cambios durante el curso de la investigación. ... Las variables de control en sí mismas no son de interés primario para el experimentador.
Explanation:
