Que diferencia hay entre etica militar y profesional ayuda porfa

What groups of species are alive, eukaryotes, symmetrical, have backbones, and are tetrapods? (didn't mean to put spanish)

Assignment needs a spanish native to answer this question: ¿qué hacía tu mamá o tu papá cuando tenía seis años?

If you were talking to someone about maria and juan. which pronoun could you use to avoid constantly repeating maria y juan