Evolution would be the answer you may be looking for.
Answer:
Bubbles are nothing but the oxygen which arise around the green parts of the plant.
Mitochondria use oxygen to make ATP in a process called oxidative phosphorylation. Mitochondrion are found in most eukaryotic cells which are cells that make up plants, animals and fungi.
Answer:
RNA polymerase
The main enzyme involved in transcription is RNA polymerase, which uses a single-stranded DNA template to synthesize a complementary strand of RNA.
Explanation:
