Can someone help me out and put this in order please?

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

Most of the carbon on earth is stored in the form of

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection