Is lightning necessary for survival of mankind?
but lightning helps fix nitrogen, which is necessary for plant growth.
Which life process is not necessary for the survival of an individual organism but is important for the survival of the species?
The life function that is necessary for the survival of the species but not necessary for the survival of an idividual organism is?
Why would Y chromosome be unlikely to contain any of the genes that are absolutely necessary for survival?
The Y chromosome does not contain genes that are critical for human survival because it carries only the genes necessary for determining the sex of the child (specifically that of a male.) It does little else than direct the development of male traits. So, although it is necessary for reproduction, organisms born without Y chromosomes have the possibility of survival, while those born without X chromosomes have no possibility of survival.