We appear to be solid but which of the following components is critical for all living things

1. which of the following is correct regarding opiates/opioids: a. they all have a natural component as a starting pointb. they have low addiction possibilitiesc. methadone binds to some of the same receptorsd. a and care correcte. all are correct

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.