The correct answer is d. 3.5 billion years.
Prokaryotes were the first forms of life on Earth long before simple multicellular life appeared because of their ability to withstand extreme conditions. It is believed that the first living forms were bacteria combined with archaea in the microbial mat (multi-layered sheet).
The G1 phase is a period in the cell cycle during interphase that happens after cytokinesis.
Answer:
Gas
Explanation:
Gas has no definite shape and all.
