Relationships Between Animals - Some have lifelong relationships with other organisms, called symbiotic. Web animal species rely on each other, too. Web an organism that must obtain their nutrients by eating (consuming) other organisms is called a consumer, or a heterotroph.
Web an organism that must obtain their nutrients by eating (consuming) other organisms is called a consumer, or a heterotroph. Web animal species rely on each other, too. Some have lifelong relationships with other organisms, called symbiotic.