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:
La respuesta es A. Entrevistado. ¡Siempre recuerda que el primero es lo primero! ¡Espero que esto ayude! ~ Otoño :)
Answer:
The following answers are correct:
Explanation:
LETICIA Me gusta que tú (1) quieras hacer algo, Raúl. Pero me sorprende que (2) digas que hay que cambiar cosas en la universidad. Aquí reciclamos el papel, el plástico...
1. The first one says “would you like to go to a party tonight”
2. “What are you doing tonight”
I’m sorry, I don’t know the rest
