Earth formed about years ago, and the oldest known living organisms date to years ago.
a. 4.6 billion years ago 3.5 billion years agob. 6,000 years ago 6,000 years agoc. 13.7 billion years ago 4.6 billion years agod. 3.9 million years ago 2.0 billion years ago

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

True or false multiple lane changes must be done individually going through the same procedures for each lane change

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?