Take the 2-minute tour ×
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

If all of the characteristics of life are required for something to be defined as living, how can we account people or other life that can not reproduce?

share|improve this question
add comment

1 Answer

up vote 1 down vote accepted

Every species has the ability to reproduce. Of course, individuals within a species can be born with a mutation that keeps them from reproducing, or lose the ability to reproduce at some point in life. However, to say that once these individuals fail to meet that criteria they are no longer forms of life would be a fairly absurd semantics argument. It might be useful to note in an evolutionary sense that those individuals can no longer pass on their genes, which is could select against whatever it was the resulted in that individual being sterile.

You could probably reword the characteristics of life to stress species instead of individuals, but then theres a problem with microbes which have very poorly, or non-existent species. But in general, this is not something a biologist is going to lose sleep over.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.