Question

7. What is the difference between "obligate" and facultative relationships?

Answer 1

S.No.	Facultative Relationships	Obligate Relationships
1.	In this relationship both the organisms can survive independently, but it benefits if both of them remain together.	In this relationship one organism cannot survive without the other, i.e. both rely on one another.
2.	Eg: Honeybees and flowers The honeybees get nectar and pollen  from the flowers and the flowers get its pollen spread to other .	Eg: Ants and the Acacia plant The Acacia plant provides food and shelter to the plant. In return the ants give protection to the plant from being eaten by any herbivore or organism and also remove other plants from the vicinity of their plants so that they can grow better.
3.	Gives each organism a chance of survival but is not necessary.	Required in order to survive.