It's from creationists.
Scientific.
OK, because you know so much more than I do, let me try to understand this again about species. You said,
"In
biology, a
species is the basic unit of
classification and a
taxonomic rank of an
organism, as well as a unit of
biodiversity
OK, so a species (in biological terms) is "often defined as the largest group of
organisms in which any two individuals of the appropriate
sexes or mating types can
produce fertile offspring, typically by
sexual reproduction."
(That's one way of defining species according to what you sayis the biological terminology of species. So that would be the largest group of organisms in which individuals that can mate with another can produce fertile offspring, typically by sexual reproduction. In otder to understand this, re: sexual reproduction as the typical way, what other way would there be? and can you please give examples of what you say above might be the largest group?)
You also said there are (if I understand you correctly), other ways of defining species, "Other ways of defining species include their
karyotype,
DNA sequence,
morphology, behaviour or
ecoogical niche. In addition,
paleontologists use the concept of the
chronospecies since
fossil reproduction cannot be examined."
Not that I know what karyotype is, and how the other things fit into defining a species, but regardlesss, does that relate to the first definition you put forth? (basic unit of classification of those organisms that can mate with one another and produce, I suppose, viable, sustainable and mateable offspring)?
What is or is there a difference between the first definition you gave, according to science, and the second definition of species, also which you seem to indicate is according to science.