Answer:
2,3,4
Mitosis is the reason we can grow, heal wounds, and replace damaged cells
One can go into environmental policy and lobby new legislation. in physics you can be a physicist. if you go into chemistry you can work for the government in a lab. etc.
The human egg cell is the largest cell in the human body, measuring approximately 0.13 mm in diameter.
Its size is 10 times the diameter and 1000 times the volume of most other human body cells. It can actually be seen without the aid of a microscope if one observes keenly.
Unlike ordinary body cells which have a cell membrane, the egg has a special outer coat called zona pellucida which is made up of a jelly-like extracellular matrix composed mainly of glycoproteins.
Something that involves oxygen because because oxygen is recycling from the water cycle...a.c.d