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