How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
Includes definitions AND examples, so what could be the correct answer might not count as a match--just find the other copy of the same word and drag to your answer.
the close relationship that exists when two or more species live together
the relationship in which one organism benefits and the other organism is neither harmed nor helped
the relationship between two or more organisms that live closely together and both benefit from each other
the relationship in which one organism benefits while the other is harmed
ex: flower and bee
ex: shark and remora
ex: tick and dog
ex: clownfish ("Nemo") and anemone
ex: mosquito and you