Relationships in Ecosystems

Question 1

Commensalism

Answer 1

an association between two organisms in which one benefits and the other derives neither benefit nor harm

Examples:
Hermit crabs - These crabs have to find shells for shelter and use various snail shells. These shells are available because the snail has died; so, the snail is not affected.

Question 2

Mutalism

Answer 2

a relationship between two species of organisms in which both benefit from the association.

Examples:
Bees pollinate apple trees.
.. The bees get food.
.. The apple trees get pollinated.

Question 3

Parasitism

Answer 3

is a non-mutual symbiotic relationship between species, where one species, the parasite, benefits at the expense of the other, the host

Examples:
Mistletoe
It attaches to the brunches of a tree and take nutrients and water from its host; the tree. It commonly only reduces the tree’s growth but sometimes kills the tree with heavy-infestation.