Question

_________ is a group of closely related organisms that are capable of interbreeding and producing fertile offspring.

Answer 1

The organisms in higher taxons like kingdom, phylum/division, class, order, family and genus exhibit very few similar characterisitcs. Hence the organisms belonging to these taxons cannot interbreed and produce fertile offsprings.

Whereas the species are a group of closely related organisms that are capable of interbreeding and producing fertile offspring.