Scientists think that algae first evolved approximately 2.7 billion years ago, and soon after this oxygen began to exist in the atmosphere. Photosynthesis by primitive plants and algae released oxygen, which gradually built up in the atmosphere.
Explanation:
The proper answer would be "va a estudiar", being it isthe only answr with the right conjugation.
Answer:
you need respond the message with the words you prefer, I will give you some examples
Explanation:
1
Hola David, si recuerdo muy bien lo que comimos, creo que no falta nada por el momento, nos vemos el miércoles.
2
Hola David, si recuerdo muy bien lo que comimos, la profesora comió una ensalada con de lechuga y espinaca, pero al final pidió un postre grande, nos vemos el miércoles
