Every living thing is made up of cells. If cells did not exist, there would be no life.
It would eventually go extinct. If you put a shark in a fresh water pond and it can't adapt to fresh water it will die.
Answer:
Genes are responsible for all aspects of life, and making proteins and chromosomes.
Answer:
The plant used everything around it in order to continue growing.
Explanation:
Although nothing was added, the plant might have had a rich soil, so with that rich soil it was able to grow on its own. The plant might have been placed near a window, so it had enough sunlight in the day. And, the classroom might have had a air-conditioned room flowing, with enough space for the plant to grow in.
Hope this helps :D