What is an effect of adaptive radiation?

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.

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Which of the follow describes a disadvantage secondary sources have compared to primary sources?