Answer:
A
Explanation:
different types of cells use different amounts of energy
Answer: (1) photosynthesis occurred
Explanation: The photosynthesis process in cianobacteria changed the composition of earth's atmosphera, rising oxygen levels. This could be possible since photosynthesis used energy from the sun to produce energetic intermediaries to synthesize sugars, and as byproduct due to water photolisis, is oxygen.
No, each cell is specialized for certain functions and will transcribe genes when they are needed.
Hope this helps!
-Payshence xoxo
