13. * List 4 types of species/species interactions found within most communities

Question

13.      *List 4 types of species/species interactions found within most communities.

            [Note: There are more than 4 types of interactions. You may choose any 4]

* Which type of interaction is (– , –) negative to both species involved?

* Organisms are found where they are on Earth because

A) ______________B) ______________ or C ) ________________________

* Once an organism is in an area what 3 factors determine whether it stays in                  that area for a long time? (In other words, long term distribution patterns are            determined by these three factors:)

_________________ B________________& C.____________________

* If a species is said to be a “keystone species” in its community, what does that mean?  

*Give one example (name of species and its community)

Explanation / Answer

13. 4 types of species species interactions are:-

Mutualism

Commensalism

Parasitism

Competition

The competition type of interaction is (-,-) for both species.

Keystone species :-

These are the species which play and important role in the functioning of an ecosystem. This role is unique and very crucial for that ecosystem

For example red mangroove is a plant found near the shoreline,it protects the soil from erosion and also home to many organisms.

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