Answer:
Symbiosis is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic. The organisms, each termed a symbiont, must be of different species.
Nitrogen-fixing bacteria are microorganisms present in the soil or in plant roots that change nitrogen gases from the atmosphere into solid nitrogen compounds that plants can use in the soil.
Vertebrates or invertebrates reason being that invertebrates such as an arthropod, mollusk, annelid, coelenterate, etc. <span>comprising 95 percent of animal species and about 30 different phyla Crazy right? Vertebrates like us and other creatures make up the rest which have a backbone unlike invertebrates..</span><span />
Interruption of blood supply to brain is caused by cerebral hemorrhage.
