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:
Pides/pido is the correct answer if you need help with anything else I’m here:)
1- do you like burgers?
2 - do you like yogurt?
3 - which do you prefer orange juice or milk?
4- what time do you eat breakfast?
5- what do you eat for breakfast?
6- what do you drink for breakfast?
7- At what time do you eat lunch?
8- what do you eat for lunch ?
.. hope this helped :/
