Viruses smaller than the host they infect

The cluster of developing cells from conception until birth is called an

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

This is the interaction of two organisms where one is and the other is neither nor harmed.