Try to collect all the currently accepted meanings for the word 'species'. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand and bacteria on the other hand.

(N/A) In biological terms,a species is the basic taxonomical rank. It can be defined as a group of similar organisms that are capable of interbreeding under natural conditions to produce fertile offspring.
For higher plants and animals,the biological species concept (based on reproductive isolation) is primarily used. However,for bacteria,which reproduce asexually,the species definition is based on genetic similarity,biochemical characteristics,and $16S$ rRNA gene sequencing rather than interbreeding.
Therefore,a species is a group of individuals that share a common gene pool and evolutionary history.