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:
You should call her Mrs. (last name)
Mrs is pronounced like misses
In spanish, you should call her senora
got what right, but congrats btw..
A Álvaro Le duelen las piernas. le
ANSWER:
Voy al <u>baño</u> para ducharme.
HOPE THIS HELPS...!!
