My teacher gives my hard work

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

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of