What two types of relationships exhibit symbiosis?

Aseries of connections of food chain in an ecosystem is called a what

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.

When the body has a weakened immune system, the production of antibodies is increased.