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:
Answer:
The answer is 'conducen' if it's present tense.
'condujeron' if it's past tense.
'conducirán' if it's future tense.
'están conduciendo' if it's present continuous.
Explanation:
Can’t answer question what does the audio say?
Para el la actividad vista en esta imagen
that is for the activity seen in this image btw
